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1. 发明授权

US07634020B2 Preamble for a TFI-OFDM communications system 有权
标题翻译：用于TFI-OFDM通信系统的前缀
公开(公告)号：US07634020B2
公开(公告)日：2009-12-15
申请号：US10782095
申请日：2004-02-19
申请人： Anuj Batra , Jaiganesh Balakrishnan , Anand Dabak
发明人： Anuj Batra , Jaiganesh Balakrishnan , Anand Dabak
IPC分类号： H04L27/00
CPC分类号： H04B1/7093 , H04B1/709 , H04L27/2613
摘要： System and method for simplifying preamble detection and reducing power consumption in receivers. A preferred embodiment comprises a preamble made up of two sequences, a first sequence that is specified in the time domain and a second sequence that is specified in the frequency domain. The first sequence which comprises multiple copies of a time domain code sequence can allow easy detection of the preamble while the second sequence comprises multiple copies of a frequency domain code sequence and allows easy determination of the frequency response of the communications channel. A hierarchical sequence can be used to allow multi-stage correlation. This can result in a less complex correlator, hence lower power consumption. Piconets can use different code sequences to allow rapid determination of the source of a transmission without requiring the receiver to decode the entire transmission.
摘要翻译：用于简化前导码检测并降低接收机功耗的系统和方法。优选实施例包括由两个序列组成的前导码，在时域中指定的第一序列和在频域中指定的第二序列。包括时域码序列的多个副本的第一序列可以容易地检测前置码，而第二序列包括频域码序列的多个副本，并且允许容易地确定通信信道的频率响应。可以使用分级序列来允许多级相关。这可能导致较不复杂的相关器，从而降低功耗。微微网可以使用不同的码序列来快速确定传输源，而不需要接收机对整个传输进行解码。

2. 发明申请

US20050180375A1 System and method for channelization and data multiplexing in a wireless communication network 审中-公开
标题翻译：用于无线通信网络中的信道化和数据复用的系统和方法
公开(公告)号：US20050180375A1
公开(公告)日：2005-08-18
申请号：US11032402
申请日：2005-01-10
申请人： Anuj Batra , Jaiganesh Balakrishnan , Anand Dabak , Nathan Belk , Danielle Griffith
发明人： Anuj Batra , Jaiganesh Balakrishnan , Anand Dabak , Nathan Belk , Danielle Griffith
IPC分类号： H04B1/69 , H04J11/00 , H04J13/00 , H04B7/208
CPC分类号： H04B1/71632 , H04J13/0022
摘要： A system and method for channelization and data multiplexing in ultra-wideband (UWB) wireless communication system is described. The spectrum allocated for UWB in a multi-band OFDM (orthogonal frequency division multiplex) system is subdivided into various bands. A set of time frequency codes (TFC's) is defined, wherein each code specifies one of a plurality of unique band versus time sequences for a particular band group, for sequential data symbols of a given piconet. The separation of data words from multiple devices or multiple simultaneously operating piconets (SOP's) is provided by a combination of FDMA and TFC's. The combination of FDMA and TFC's provides a simplified interface between the MAC and PHY.
摘要翻译：描述了在超宽带（UWB）无线通信系统中的信道化和数据复用的系统和方法。在多频带OFDM（正交频分复用）系统中为UWB分配的频谱被细分成各种频带。定义一组时间频率码（TFC），其中每个码指定给定微微网的顺序数据符号的特定频带组的多个唯一频带对时间序列中的一个。数据字从多个设备或多个同时操作的微微网（SOP）的分离由FDMA和TFC的组合提供。 FDMA和TFC的组合提供了MAC和PHY之间的简化接口。

3. 发明申请

US20050050130A1 Ranging in multi-band OFDM communications systems 审中-公开
标题翻译：在多频带OFDM通信系统中进行测距
公开(公告)号：US20050050130A1
公开(公告)日：2005-03-03
申请号：US10932894
申请日：2004-09-02
申请人： Anand Dabak , Anuj Batra , Jaiganesh Balakrishnan
发明人： Anand Dabak , Anuj Batra , Jaiganesh Balakrishnan
IPC分类号： G06F17/15 , H04J1/16 , H04J3/06 , H04L7/04 , H04L27/26
CPC分类号： H04J1/16 , H04J3/0682 , H04L7/041 , H04L27/2601
摘要： System and method for determining a separation between communicating devices. A preferred embodiment comprises a first device transmitting a signal over multiple subbands to a second device, the second device determining a timing for the signal by processing the signal in each subband separately. The second device then transmits a signal back to the first device along with timing information (again, over multiple subbands). The first device then determines a timing for the signal and by determining a difference in the timing information provided by the second device and timing information it determines, the first device can compute the separation between it and the second device. The use of multiple subbands can dedicate more bandwidth to the transmission of the signal, permitting greater resolution.
摘要翻译：用于确定通信设备之间的间隔的系统和方法。优选实施例包括将多个子带上的信号发送到第二设备的第一设备，第二设备通过分别处理每个子带中的信号来确定信号的定时。然后，第二设备连同定时信息（再次，通过多个子带）一起发送回到第一设备的信号。然后，第一设备确定信号的定时，并且通过确定由第二设备提供的定时信息和它确定的定时信息的差异，第一设备可以计算它与第二设备之间的间隔。使用多个子带可以将更多的带宽专用于信号的传输，从而允许更高的分辨率。

4. 发明申请

US20050237923A1 Multi-bank OFDM high data rate extensions 审中-公开
标题翻译：多行OFDM高数据速率扩展
公开(公告)号：US20050237923A1
公开(公告)日：2005-10-27
申请号：US11115816
申请日：2005-04-26
申请人： Jaiganesh Balakrishnan , Anuj Batra , Anand Dabak
发明人： Jaiganesh Balakrishnan , Anuj Batra , Anand Dabak
IPC分类号： H04B7/02 , H04J1/00 , H04J11/00 , H04L27/26
CPC分类号： H04L27/2602 , H04B7/02
摘要： A transmitter 200 is provided. The transmitter 200 comprises a mapper 207 operable to map a bit stream into a plurality of tones to promote high data rate multi-band orthogonal frequency division multiplex communication, wherein the tones can take on sixteen or more different values 300. In another embodiment a communications system 1360 is provided that includes a transceiver 1362 that has two or more antennas 1394 and 1396. The transceiver 1362 transmits a first multi-band orthogonal frequency division multiplex signal in multiple input/multiple output mode and receives a second multi-band orthogonal frequency division multiplex signal in multiple input/multiple output mode. In another embodiment, a transceiver 200, 202 transmits a first multi-band orthogonal frequency division multiplex symbol concurrently on a plurality of sub-bands and receives a second multi-band orthogonal frequency division multiplex symbol concurrently on a plurality of sub-bands.
摘要翻译：提供发射机200。发射机200包括映射器207，其可操作以将比特流映射成多个音调以促进高数据速率多频带正交频分多路复用通信，其中音调可以具有十六个或更多个不同的值300.在另一个实施例中，通信提供系统1360，其包括具有两个或多个天线1394和1396的收发机1362.收发机1362以多输入/多输出模式发送第一多频带正交频分多路复用信号，并接收第二多频带正交频分多重输入/多输出模式下的多路复用信号。在另一个实施例中，收发器200,202在多个子带上同时发送第一多频带正交频分复用符号，并且在多个子带上同时接收第二多频带正交频分复用符号。

5. 发明申请

US20080069255A1 Efficient Bit Interleaver for A Multi-Band OFDM Ultra-Wideband System 审中-公开
标题翻译：用于多频带OFDM超宽带系统的高效位交织器
公开(公告)号：US20080069255A1
公开(公告)日：2008-03-20
申请号：US11939222
申请日：2007-11-13
申请人： Jaiganesh Balakrishnan , Anuj Batra , Anand Dabak
发明人： Jaiganesh Balakrishnan , Anuj Batra , Anand Dabak
IPC分类号： H04L27/00
CPC分类号： H04L1/0059 , H03M13/2707 , H04B1/7176 , H04B1/719 , H04L1/0068 , H04L1/0071 , H04L5/0007 , H04L5/0042 , H04L5/0044 , H04L5/0083
摘要： An efficient bit interleaving scheme for a multi-band OFDM ultra-wideband (UWB) system. The encoded bits of the multi-band OFDM system are interleaved within each OFDM symbol and across OFDM symbols. The bit interleaving scheme minimizes performance degradation due to groups of contiguous OFDM tones experiencing a poor SNR caused by the frequency selective channel, exploits the frequency diversity across sub-bands, randomizes the effect of co-channel interference from simultaneously operating un-coordinated piconets, and randomizes the impact of generic narrow-band interferers present within the UWB spectrum.
摘要翻译：一种用于多频带OFDM超宽带（UWB）系统的有效位交织方案。多频带OFDM系统的编码比特在每个OFDM符号内和OFDM符号之间进行交织。比特交织方案最小化由于频率选择信道引起的差的SNR的连续OFDM音调组的性能下降，利用子频带上的频率分集，随机化来自同时操作的非协调微微网的同信道干扰的影响，并随机化UWB频谱内存在的通用窄带干扰源的影响。

6. 发明申请

US20050265490A1 Enhanced channel estimator, method of enhanced channel estimating and an OFDM receiver employing the same 有权
标题翻译：增强信道估计器，增强信道估计方法和采用该方法的OFDM接收机
公开(公告)号：US20050265490A1
公开(公告)日：2005-12-01
申请号：US11136121
申请日：2005-05-24
申请人： Charles Sestok , Anand Dabak , Jaiganesh Balakrishnan
发明人： Charles Sestok , Anand Dabak , Jaiganesh Balakrishnan
IPC分类号： H04L25/02 , H04L27/06 , H04L27/26
CPC分类号： H04L25/0232 , H04L25/0212 , H04L25/022 , H04L27/2647
摘要： The present invention provides an enhanced channel estimator for use with an orthogonal frequency division multiplex (OFDM) receiver employing scattered pilot channel estimates. In one embodiment, the enhanced channel estimator includes a time interpolation estimator configured to provide time-interpolation channel estimates having at least one image for a portion of carriers having the scattered pilot channel estimates. The enhanced channel estimator also includes a frequency interpolation estimator coupled to the time interpolation estimator and configured to provide frequency-interpolation channel estimates for each carrier based on image suppression through balanced-error filtering.
摘要翻译：本发明提供了一种与使用分散导频信道估计的正交频分复用（OFDM）接收机一起使用的增强信道估计器。在一个实施例中，增强信道估计器包括时间插值估计器，其被配置为提供对具有分散导频信道估计的载波的一部分具有至少一个图像的时间插值信道估计。增强信道估计器还包括耦合到时间插值估计器并被配置为基于通过平衡误差滤波的图像抑制来为每个载波提供频率插值信道估计的频率内插估计器。

7. 发明申请

US20070076804A1 Image-rejecting channel estimator, method of image-rejection channel estimating and an OFDM receiver employing the same 审中-公开
标题翻译：图像拒绝信道估计器，镜像抑制信道估计方法和采用该方法的OFDM接收机
公开(公告)号：US20070076804A1
公开(公告)日：2007-04-05
申请号：US11240203
申请日：2005-09-30
申请人： Charles Sestok , Anand Dabak , Jaiganesh Balakrishnan
发明人： Charles Sestok , Anand Dabak , Jaiganesh Balakrishnan
IPC分类号： H04K1/10
CPC分类号： H04L25/0232 , H04B1/123 , H04L27/261
摘要： The present invention provides an image-rejecting channel estimator for use with an orthogonal frequency division multiplex (OFDM) receiver employing scattered pilot channel estimates. In one embodiment, the image-rejecting channel estimator includes an estimation interpolator configured to provide channel estimates through time interpolation and frequency interpolation employing the scattered pilot channel estimates. The image-rejecting channel estimator also includes an image-rejection formatter coupled to the estimation interpolator and configured to provide image-rejection filtering to suppress an image in an output spectrum of the channel estimates from at least one of the time interpolation and frequency interpolation.
摘要翻译：本发明提供一种与使用分散导频信道估计的正交频分复用（OFDM）接收机一起使用的图像拒绝信道估计器。在一个实施例中，图像拒绝信道估计器包括估计内插器，被配置为通过使用分散导频信道估计的时间插值和频率插值来提供信道估计。图像拒绝信道估计器还包括耦合到估计内插器的镜像拒绝格式器，并且被配置为提供镜像抑制滤波以从时间插值和频率插值中的至少一个抑制信道估计的输出频谱中的图像。

8. 发明申请

US20050207335A1 Downlink signaling for a multi-carrier communications system 有权
标题翻译：多载波通信系统的下行链路信令
公开(公告)号：US20050207335A1
公开(公告)日：2005-09-22
申请号：US11085305
申请日：2005-03-21
申请人： Timothy Schmidl , Eko Onggosanusi , Anand Dabak , Aris Papasakellariou , Jaiganesh Balakrishnan , Yan Hui
发明人： Timothy Schmidl , Eko Onggosanusi , Anand Dabak , Aris Papasakellariou , Jaiganesh Balakrishnan , Yan Hui
IPC分类号： H04J11/00 , H04L1/00 , H04L1/16 , H04L1/18
CPC分类号： H04L1/1845 , H04L1/0026 , H04L1/1671
摘要： System and method for signaling control information in a multi-carrier communications system to transmit data. A preferred embodiment comprises demodulating a first carrier that is used for transmitting a control channel transmission, determining a second carrier that is used for transmitting a data channel transmission based upon the demodulated control channel transmission, and demodulating the second carrier to obtain the data channel transmission. Additionally, designs for multi-carrier receivers are provided.
摘要翻译：用于在多载波通信系统中用于信令控制信息的数据传输的系统和方法。优选实施例包括解调用于发送控制信道传输的第一载波，基于解调的控制信道传输确定用于发送数据信道传输的第二载波，以及解调第二载波以获得数据信道传输。另外，提供了多载波接收机的设计。

9. 发明申请

US20050265467A1 Intercarrier interference cancellation algorithm 审中-公开
标题翻译：载波间干扰消除算法
公开(公告)号：US20050265467A1
公开(公告)日：2005-12-01
申请号：US11061977
申请日：2005-02-18
申请人： Anand Dabak , Jaiganesh Balakrishnan , Charles Sestok
发明人： Anand Dabak , Jaiganesh Balakrishnan , Charles Sestok
IPC分类号： H04K1/10 , H04L27/26
CPC分类号： H04L27/2647
摘要： A method comprising wirelessly transmitting and receiving a data signal in an orthogonal frequency division multiplexing (OFDM) system. The method further comprises, in the frequency domain, at least partially removing overlap between a first received subcarrier frequency data and a second received subcarrier frequency data.
摘要翻译：一种在正交频分复用（OFDM）系统中无线发送和接收数据信号的方法。该方法还包括在频域中至少部分地去除第一接收副载波频率数据和第二接收副载波频率数据之间的重叠。

10. 发明申请

US20050245199A1 Scalable, cooperative, wireless networking for mobile connectivity 审中-公开
标题翻译：可扩展的，协作的，无线网络的移动连接
公开(公告)号：US20050245199A1
公开(公告)日：2005-11-03
申请号：US11062729
申请日：2005-02-22
申请人： Anuj Batra , Nathan Belk , Anand Dabak , Michael DiRenzo , Manish Goel , Jin-Meng Ho , Srinath Hosur , Xiaolin Lu , David Magee , Donald Shaver , Hirohisa Yamaguchi
发明人： Anuj Batra , Nathan Belk , Anand Dabak , Michael DiRenzo , Manish Goel , Jin-Meng Ho , Srinath Hosur , Xiaolin Lu , David Magee , Donald Shaver , Hirohisa Yamaguchi
IPC分类号： H04B1/38
摘要： A wireless transceiver 10 is provided that includes a configurable analog component 14 and a controller portion 18. The configurable analog component 14 is operable to receive an input radio frequency signal and to transmit the output radio frequency signal. The controller portion 18 is operable to promote adjustment of a bandwidth of the configurable analog component 14 from at least a first bandwidth to a second bandwidth.
摘要翻译：提供了一种无线收发机10，其包括可配置的模拟组件14和控制器部分18。可配置模拟组件14可操作以接收输入射频信号并传输输出射频信号。控制器部分18可操作以促进将可配置模拟组件14的带宽从至少第一带宽调整到第二带宽。

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