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    • 1. 发明授权
    • Asymmetric data transmission for use in a multi-modulation environment
    • 用于多调制环境的非对称数据传输
    • US06377817B1
    • 2002-04-23
    • US09551012
    • 2000-04-18
    • Markus HakasteShkumbin HamitiHarri JokinenEero Nikula
    • Markus HakasteShkumbin HamitiHarri JokinenEero Nikula
    • H04B138
    • H04W28/18H04L1/0003H04L1/0009H04L1/0022H04L1/0038H04L27/0012Y02D70/1222Y02D70/1226
    • A data transmission method and system for circuit switched and other services that can be employed in TDMA-based systems, and that supports the use of one or several types of modulation (e.g., 8-PSK modulation), in addition to a “normal” modulation (e.g., GMSK modulation) on a radio interface. An additional modulation/channel coding (e.g., one based on 8-PSK) may be used in the downlink transmission, while the normal modulation/channel coding (e.g., one based on GMSK) may be used in the uplink transmissions, under a variety of different conditions. A first condition arises where the radio conditions allow the use of the additional modulation in both directions, but the mobile station transmitter does not support it. A second condition arises where the radio conditions allow the use of the additional modulation in both directions, and the mobile station supports it, but the user requests a downlink-biased or uplink-biased data transmission service. A third condition arises where the mobile station supports the use of the additional modulation in both directions, but the uplink (or downlink) radio conditions do not permit the use of the additional modulation (e.g., because of link budget limitations.) Also, a lower data rate may be desired on the uplink in order to reduce the power consumption of the mobile station, and/or in the downlink direction to avoid unnecessary interference. This is especially true in the case that one direction or the other has less data to transmit, and the high speed data transmission mode is not required (even if supported).
    • 一种用于电路交换和其他服务的数据传输方法和系统,其可以在基于TDMA的系统中使用,并且除了“正常”之外还支持使用一种或几种类型的调制(例如,8-PSK调制) 在无线电接口上进行调制(例如,GMSK调制)。 在下行链路传输中可以使用附加的调制/信道编码(例如,基于8-PSK的一个)编码(例如,基于GMSK的正常调制/信道编码)可以在上行链路传输中使用 的不同条件。 出现无线电条件允许在两个方向上使用附加调制的第一个条件,但移动台发射机不支持它。 出现第二个条件,其中无线电条件允许在两个方向上使用附加调制,并且移动台支持它,但是用户请求下行链路偏置或上行链路偏置的数据传输服务。 第三个条件出现在移动台支持在两个方向上使用附加调制,但是上行链路(或下行链路)无线电条件不允许使用附加调制(例如,由于链路预算限制)。另外,一个 为了降低移动台的功率消耗和/或在下行链路方向,为了避免不必要的干扰,在上行链路上可能希望较低的数据速率。 在一个方向或另一方向具有较少的传输数据的情况下尤其如此,并且不需要高速数据传输模式(即使被支持)。
    • 2. 发明授权
    • Method and receiver for receiving and decoding signals modulated with different modulation methods
    • 用于接收和解码用不同调制方式调制的信号的方法和接收机
    • US06690751B1
    • 2004-02-10
    • US09548650
    • 2000-04-13
    • Eero NikulaHarri Jokinen
    • Eero NikulaHarri Jokinen
    • H03M1312
    • H04L1/0038H04L1/0003H04L1/0032H04L1/0047H04L1/0054H04L1/0061H04L1/0071H04L27/0008H04L27/0012H04L27/2017H04L27/2067H04L27/22
    • A method is presented for demodulating and decoding a block of received digital information consisting of a number of subblocks. One of a predefined number of demodulation methods is selected for demodulating each subblock and each subblock is demodulated with the demodulation method selected for it. The subblocks constituting a block of digital information are combined between their demodulation and the decoding of the block of digital information. Soft decoding is used to decode the block of digital information, wherein each subblock is converted to a sequence of soft decoding values associated with certain probabilities of allowed state transitions in the decoding process. For each subblock it is determined, after its demodulation, whether the correct demodulation method was selected for it. A subblock for which it is found that the correct demodulation method was not selected is converted to a sequence of neutral soft decoding values indicating equal probabilities for all allowed state transitions in the decoding process.
    • 提出一种用于解调和解码由多个子块组成的接收数字信息块的方法。 选择预定数量的解调方法之一用于解调每个子块,并且以为其选择的解调方法解调每个子块。 构成数字信息块的子块在其解调和数字信息块的解码之间组合。 软解码用于解码数字信息块,其中每个子块被转换成与解码过程中允许的状态转换的某些概率相关联的软解码值序列。 对于每个子块,在其解调之后,确定是否为其选择了正确的解调方法。 发现没有选择正确的解调方法的子块被转换为在解码处理中指示所有允许状态转换的相等概率的中性软解码值序列。
    • 8. 发明授权
    • Mobile equipment based filtering for packet radio service (PRS)
    • 基于移动设备的分组无线业务(PRS)过滤
    • US07599664B2
    • 2009-10-06
    • US12079317
    • 2008-03-26
    • Guillaume SebireYuping ZhaoEero Nikula
    • Guillaume SebireYuping ZhaoEero Nikula
    • H04B17/00
    • H04L1/20H04L1/0026
    • A method for operating a mobile equipment (ME 10) in a wireless network (12) includes receiving from a wireless network a parameter that is indicative of a signal quality experienced by the ME, such as by determining a speed of the ME; calculating in the ME an indication of link quality, the calculation employing a filtering operation having a filter length that is a function of the determined parameter, such as speed or derivative of the speed of the ME; and reporting the calculated indication of link quality to the wireless network. The wireless network derives an indication of ME speed and transmits the speed indication to the ME using a point-to-point message.
    • 一种在无线网络(12)中操作移动设备(ME10)的方法包括:从无线网络接收指示ME所经历的信号质量的参数,例如通过确定ME的速度; 在ME中计算链路质量的指示,所述计算采用具有作为所确定参数的函数的滤波器长度的滤波操作,诸如ME的速度的速度或导数; 并将计算出的链路质量指示报告给无线网络。 无线网络导出ME速度的指示,并使用点对点消息将速度指示发送到ME。