V-BLAST OFDM空间功率扩展
doi: 10.3724/SP.J.1146.2010.00658
Spatial Power Spreading in V-BLAST OFDM with Distributed Transmit Antennas
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摘要: 该文在多径衰落信道下，针对分布式发射天线V-BLAST OFDM，提出了一种将数据功率扩展到不同发射天线的信号发射方法。该方法利用了分布式天线间时延，增强了分布式信道的频率选择性，提高了V-BLAST OFDM可获得的分集度。在BPSK调制，M.1225步行测试信道下的仿真结果表明：当误比特率为10-3时，与传统方法相比，该文方法有大于2 dB的功率节省。Abstract: Focusing on the V-BLAST OFDM system with distributed transmit antennas in multipath fading channel, a novel signal transmission method utilizing spatial power spreading is proposed. The method takes advantage of the delays among distributed antennas and enhances frequency selectivity of the distributed channel. Thus, the achievable diversity increases. Simulation results in M.1225 pedestrian test channel show that the proposed algorithm has 2 dB gain at BER of10-3 compared to conventional method using BPSK modulation.
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Key words:
- Wireless communication /
- V-BLAST /
- Distributed transmit antenna systems /
- Power spreading
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