Transmit power allocation for BER performance improvement in multicarrier systems

被引：56
|
作者：
Park, CS [1 ]
Lee, KB [1 ]
机构：
[1] Seoul Natl Univ, Sch Elect Engn & Comp Sci, Seoul 151742, South Korea
来源：
IEEE TRANSACTIONS ON COMMUNICATIONS | 2004年 / 52卷 / 10期
关键词：
bit-error rate (BER); diversity; multicarrier system; transmit power allocation;
D O I：
10.1109/TCOMM.2004.836491
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In a multicarrier system, transmit power allocation over different subchannels is an effective means of improving the performance. We develop the optimal transmit power allocation scheme to improve bit-error rate (BER) performance in a multicarrier system with diversity reception. A simple suboptimal scheme is also derived from the optimal one, and an asymptotic case referred to as the equal-signal-to-noise ratio scheme is discussed. Numerical results show that the optimal and suboptimal power allocation schemes significantly outperform the equal power allocation scheme. The effects of the modulation level, the number of receiving antennas, and the number of subchannels on the BER performance are also investigated.
引用
收藏
页码：1658 / 1663
页数：6
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