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    • 4. 发明申请
    • IMPROVEMENTS TO AN 1XEVDO WIRELESS INTERFACE TO ENABLE COMMUNICATIONS VIA A SATELLITE RELAY
    • 改进1XEVDO无线接口,通过卫星继电器实现通信
    • WO2008014520A2
    • 2008-01-31
    • PCT/US2007/074767
    • 2007-07-30
    • QUALCOMM IncorporatedKUPPUSWAMY, KalyanNAMGOONG, JuneJAYARAMAN, SrikantJALALI, Ahmad
    • KUPPUSWAMY, KalyanNAMGOONG, JuneJAYARAMAN, SrikantJALALI, Ahmad
    • H04B7/18567
    • A communication system is provided that allows a mobile terminal with an EVDO interface to perform VoIP communications via a satellite. The 1xEVDO physical layer frames and vocoder frames are synchronized and aligned to a known periodic time boundary for efficient transmission. A reverse link transmission rate is adjusted to match a VoIP packet source rate and operate the reverse link transmission channel to a satellite continuously. The reverse link transmission channel from a mobile terminal to a satellite may operate continuously and at a lower channel transmission rate to reduce the peak power amplifier power requirement. The higher layer time-out periods are increased to account for propagation delay to/from a satellite relay. A physical layer retransmit mechanism is disabled to ignore ACKs/ NACKs when sending VoIP packets via a satellite relay. A different channel code may be selective applied depending on the size/type of packets being transmitted.
    • 提供一种通信系统,其允许具有EVDO接口的移动终端经由卫星执行VoIP通信。 1xEVDO物理层帧和声码器帧被同步并对齐到已知的周期时间边界以进行有效传输。 调整反向链路传输速率以匹配VoIP分组源速率并且连续地向卫星操作反向链路传输信道。 从移动终端到卫星的反向链路传输信道可以连续地以较低的信道传输速率工作,以降低峰值功率放大器的功率需求。 更高层的超时周期被增加以考虑到/从卫星中继的传播延迟。 当通过卫星中继发送VoIP分组时,物理层重传机制被禁止忽略ACK / NACK。 根据发送的分组的大小/类型,可以选择性地应用不同的信道码。
    • 7. 发明申请
    • SATELLITE OPTIMIZED AIR INTERFACE
    • 卫星优化空气界面
    • WO2007149690A2
    • 2007-12-27
    • PCT/US2007/070131
    • 2007-05-31
    • QUALCOMM INCORPORATEDJALALI, Ahmad
    • JALALI, Ahmad
    • H04B7/18563H04B7/216
    • A method is disclosed for establishing communication links in a satellite based wireless communication system. The method includes: establishing a forward link from the satellite to at least one of a plurality of subscriber wireless communication devices (WCDs) by use of a shared frequency multi-user communication protocol; applying an error correction code to use in the forward link, whereby the error correction applies to an aggregation of communications provided to multiple ones of the WCDs; and receiving communications in a return link signal by use of a protocol providing channels having dedicated frequency assignments and non-slotted channel assignment.
    • 公开了一种在基于卫星的无线通信系统中建立通信链路的方法。 该方法包括:通过使用共享频率多用户通信协议,建立从卫星到多个用户无线通信设备(WCD)中的至少一个的前向链路; 应用纠错码用于前向链路,由此纠错适用于提供给多个WCD的通信的聚合; 以及通过使用提供具有专用频率分配和非时隙信道分配的信道的协议来在返回链路信号中接收通信。
    • 8. 发明申请
    • IMPROVED TURBO CODE INTERLEAVER FOR LOW FRAME ERROR RATE
    • 用于低帧错误率的改进的涡轮代码交换器
    • WO2007047472A1
    • 2007-04-26
    • PCT/US2006/040153
    • 2006-10-12
    • QUALCOMM INCORPORATEDCHEN, PeiJALALI, Ahmad
    • CHEN, PeiJALALI, Ahmad
    • H03M13/27H03M13/29
    • H03M13/2789H03M13/271H03M13/276H03M13/2771H03M13/2957
    • At least one aspect of the invention provides a turbo encoder (104) having parallel first and second constituent encoders (202,206) and an interleaver (204) coupled as an input to the second constituent encoder to provide a permutated version of the binary data input to the first constituent encoder to achieve a low frame error rate. The interleaver is configured to parse the binary data input into an input block, determine a permutation vector, and rearrange the order of the binary data in the input block according to a set of predetermined permutation equations. The rearranged binary data in the information block is then passed to the second constituent encoder to improve the distance spectrum of the transmitted redundant data.
    • 本发明的至少一个方面提供了一种具有并行的第一和第二组成编码器(202,206)和交织器(204)的turbo编码器(104),其作为输入耦合到第二组成编码器,以提供二进制数据输入的置换版本 第一个组成编码器实现低帧错误率。 交织器被配置为将输入的二进制数据解析成输入块,确定置换向量,并且根据一组预定的置换方程重新排列输入块中的二进制数据的顺序。 然后将信息块中的重新排列的二进制数据传递给第二组成编码器,以改善发送的冗余数据的距离谱。
    • 9. 发明申请
    • ANTENNA ARRAY PATTERN DISTORTION MITIGATION
    • 天线阵列失真减缓
    • WO2006105298A1
    • 2006-10-05
    • PCT/US2006/011650
    • 2006-03-28
    • QUALCOMM INCORPORATEDFERNANDEZ-CORBATON, IvanJALALI, AhmadOZAKI, Ernest, T.SIMON, Harris, SmithGREGORY, Sherman, A.
    • FERNANDEZ-CORBATON, IvanJALALI, AhmadOZAKI, Ernest, T.SIMON, Harris, SmithGREGORY, Sherman, A.
    • H04Q7/36H04Q7/38H01Q25/00
    • H01Q25/00
    • At least one feature provides a way to perform point-to-multipoint transmissions using adaptive or directional antennas while reducing antenna pattern distortion. Generally, rather than transmitting the same waveform to two or more receivers, an information-bearing signal is transformed into different decorrelated waveforms and each deσorrelated waveform is transmitted to a different receiver. In one implementation, an information-bearing signal is transformed into two decorrelated signals (Sl (t) , S2 (t) ) such that their crosscorrelation, or autocorrelation of the information-bearing signal, is zero or very small . Such decorrelation may be achieved by sending a first signal to a first receiver (104) while sending a second signal, having a radio frequency spectrum that is the spectrally inverted version of the first signal, to a second receiver (106) . In another implementation, a first signal is transmitted to a first receiver (104) and is also transmitted to a second receiver (106) with a time delay.
    • 至少一个特征提供了使用自适应或定向天线执行点对多点传输的方式,同时减少天线模式失真。 通常,不是将相同的波形发送到两个或更多个接收机,而是将信息承载信号变换成不同的去相关波形,并且将每个去相关的波形发送到不同的接收机。 在一个实现中,信息承载信号被变换成两个去相关信号(S1(t),S2(t)),使得其信息载运信号的互相关或自相关为零或非常小。 这种去相关可以通过向第一接收机(104)发送第一信号,同时向第二接收机(106)发送具有作为第一信号的频谱反转版本的射频频谱的第二信号。 在另一实现中,第一信号被发送到第一接收器(104),并且还以时间延迟发送到第二接收器(106)。