ADAPTIVE MODULATION AND CODING IN A SC-FDMA SYSTEM
    1.
    发明申请
    ADAPTIVE MODULATION AND CODING IN A SC-FDMA SYSTEM 有权
    SC-FDMA系统中的自适应调制和编码

    公开(公告)号:US20100002575A1

    公开(公告)日:2010-01-07

    申请号:US12517152

    申请日:2007-11-22

    IPC分类号: H04J11/00 H04L23/02 H04W72/04

    摘要: A method and a system for transmitting data by a transmitter over a channel having a predetermined channel quality estimate, comprises the steps of splitting (S2P) input data stream (S40, S60, S80) to be transmitted into a plurality of data sub-streams (S40a, S40b, S40c); processing (SYM1, SYM2, SYMj) each of the plurality of data sub-streams (S40a, S40b, S40c) into a plurality of symbol subsets (S41, S42, S43) by selecting a certain scheme of coded-modulation (BPSK, QPSK, 16-QAM); processing, separately, each of the plurality of symbol subsets (S41, S42, S43), via a plurality of separate Discrete Fourier Transforms (DFT1, DFT2, DFT3), herein after denoted as DFTs, to obtain a plurality of DFT-precoded data sub-streams (S44, S45, S46); allocating each DFT-precoded data sub-stream (S44, S45, S46) in a frequency resource block (RB1, RB2, RB3), via a sub-carrier mapping module (SCM), so that for each data sub-stream (S40a, S40b, S40c) the selected scheme of coded-modulation (BPSK, QPSK, 16-QAM) is chosen in dependence of the values of the channel quality estimate at the frequencies of its own allocated frequency resource block (RB1, RB2, RB3).

    摘要翻译: 一种用于通过具有预定信道质量估计的信道通过发射机发送数据的方法和系统包括以下步骤:将要发送的(S2P)输入数据流(S40,S60,S80)分解为多个数据子流 (S40a,S40b,S40c); 通过选择一定的编码调制方式(BPSK,QPSK),将多个数据子流(S40a,S40b,S40c)中的每一个处理(SYM1,SYM2,SYMj)分割成多个符号子集(S41,S42,S43) ,16-QAM); 分别经由多个分离离散傅里叶变换(DFT1,DFT2,DFT3)中的多个符号子集(S41,S42,S43)中的每一个表示为DFT,以获得多个DFT预编码数据 子流(S44,S45,S46); 经由子载波映射模块(SCM)将每个DFT预编码数据子流(S44,S45,S46)分配到频率资源块(RB1,RB2,RB3)中,从而对于每个数据子流 ,S40b,S40c)根据在其自己分配的频率资源块(RB1,RB2,RB3)的频率处的信道质量估计的值来选择所选择的编码调制方案(BPSK,QPSK,16-QAM) 。