发明名称 |
Transmit diversity using low code rate spatial multiplexing |
摘要 |
A system is provided for transmitting a low code rate spatially multiplexed channel on multiple antennas. The system includes a transmitter and a processor. The processor is configured such that the processor encodes a block of information bits to form channel coded bits, wherein the ratio of the number of channel coded bits to the number of information bits is greater than one; and the processor maps the channel coded bits to modulation symbols, and each channel coded bit is mapped once to a modulation symbol. The transmitter is configured to transmit a first portion of the modulation symbols using a spreading sequence on a first antenna of the multiple antennas and to transmit a second portion of the modulation symbols using the spreading sequence on a second antenna of the multiple antennas. |
申请公布号 |
US8867647(B2) |
申请公布日期 |
2014.10.21 |
申请号 |
US201213709841 |
申请日期 |
2012.12.10 |
申请人 |
BlackBerry Limited |
发明人 |
Harrison Robert Mark;Xu Hua;Earnshaw Andrew Mark;Cai Zhijun |
分类号 |
H04B7/02;H04L5/00;H04J11/00;H04J13/00;H04L1/06;H04L1/00;H04B7/06 |
主分类号 |
H04B7/02 |
代理机构 |
Conley Rose, P.C. |
代理人 |
Conley Rose, P.C. ;Brown, Jr. J. Robert |
主权项 |
1. A diversity transmission method for transmitting spatially multiplexed channel on multiple antennas, comprising:
receiving an indication of a spreading sequence; encoding a block of information bits to form channel coded bits, wherein the ratio R2 of the number of channel coded bits to the number of information bits is greater than one; mapping the channel coded bits to modulation symbols, wherein each channel coded bit is respectively mapped to a single modulation symbol; multiplexing the modulation symbols to the multiple antennas; spreading the modulation symbols to be transmitted on a first antenna of the multiple antennas with the spreading sequence; spreading the modulation symbols to be transmitted on a second antenna of the multiple antennas with the spreading sequence; and transmitting the spread modulation symbols on the antennas to which they were multiplexed. |
地址 |
Waterloo, Ontario CA |