时频扩展OFDM/FHMA

The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring. Pub Date : 2003-04-22 DOI:10.1109/VETECS.2003.1207827

K. Hamaguchi, L. Hanzo

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引用次数: 3

摘要

提出了一种基于正交频分复用和跳频多址(OFDM/FHMA)的组合方案，在不增加带宽的情况下，传输的数据在时间轴和频率轴上进行传播。OFDM系统提倡采用Walsh-Hadamard变换(WHT)在频域中进行数据的扩展，并根据估计的信干扰比(SIR)对接收到的信号进行加权，以减少干扰的影响。在限制干扰的信道上通信时所记录的性能表明，可实现的误码率改进与免除WHT的OFDM/FHMA方案的改进一样多。

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Time-frequency spread OFDM/FHMA

A combined scheme based on orthogonal frequency-division multiplexing and frequency-hopped multiple access (OFDM/FHMA) is proposed, in which the transmitted data is spread over both the time and frequency axes without expanding the bandwidth. The OFDM system advocated employs the Walsh-Hadamard transform (WHT) for spreading the data in the frequency domain and weights the received signal by the estimated signal-to-interference ratio (SIR) for the sake of reducing the effects of interference. The performance recorded, when communicating over an interference-limited channel suggests that the achievable BER improvement is as much an order of magnitude to that of an OFDM/FHMA scheme dispensing with WHT.

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来源期刊

The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring.

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