Power and bit allocation for adaptive turbo coded modulation in OFDM systems

被引：0

作者：

She, XM ^{[1
]}

Zhou, S ^{[1
]}

Xu, X ^{[1
]}

Yao, Y ^{[1
]}

机构：

[1] Tsing Hua Univ, State Key Lab Microwave & Digital Commun, Beijing 100084, Peoples R China

来源：

GLOBECOM'03: IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, VOLS 1-7 | 2003年

关键词：

adaptive modulation and coding; turbo coded modulation; OFDM;

D O I：

暂无

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：

We propose adaptive turbo coded modulation orthogonal frequency division multiplexing (OFDM) schemes with power variable over subcarriers, variable over subbands, and constant over subcarriers. Our object is to improve the overall throughput under target bit-error-rate (BER) for OFDM transmissions. Simulation results indicate that our fixed power adaptation scheme exhibits a more than 7dB signal-noise-ratio (SNR) gain relative to non-adaptive turbo coded modulation, and about 2dB additional gain can be achieved with our variable power adaptation. We also discuss the effect of the amount of subbands on throughput performance in our adaptive scheme.

引用

页码：903 / 907

页数：5

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