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Although the single antenna vector OFDM (V-OFDM) proposed by Xia is robust to channel spectral nulls, it does not necessarily attain full diversity for multi-path fading channels. In this paper, we propose a novel constellation-rotated V-OFDM (CRV-OFDM) system based on modified V-OFDM, and analyze its performance over Rayleigh fading channels. In CRV-OFDM, we design rotation angles for each symbol...
A code-division multiple access (CDMA) communication system achieves the maximum spectral efficiency over multipath fading channels if employed spreading sequences have ideal correlations, i.e., the ideal auto-correlation that are zero except for zero shift and the ideal cross-correlations that are zero for all shifts. Unfortunately, such sequences are known non-existent and, Suehiro and Hatori proposed...
In an approximately synchronous CDMA (AS- CDMA) system, zero correlation zone (ZCZ) sequences are known as the sequences to eliminate co-channel and multi- path interferences. Therefore, numerous constructions of zero correlation zone (ZCZ) sequences have been introduced e.g. based on perfect sequences, m-sequences and complete complementary codes etc.. However, the previous construction method which...
Recently, numerous constructions of zero correlation zone (ZCZ) sequences have been introduced e.g. based on perfect sequences and complete complementary codes etc.. However, the previous construction method which based on complete complementary code is lacking for merit figures when none of whose elements are zero. In this paper, a new construction method of ZCZ sequences based on complete complementary...
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