Differential Space-Time Coded Modulation

• 作者: CHENZhonglin ZHUGuangxi
• 来源期刊: 电子学报(英文版)
• 学科: 工学
• 关键词: 空时编码 差异调制 最大似然检测 友好正交设计
• 年，卷（期）: 2004,（3）
• 页码范围: 459-464
• 页数: 6页
• 分类号: TN911.22
• 语种: 中文

摘要

Relying on amicable orthogonal design, we develop for multiple-antenna systems a General differential space-time block code (GDSTBC), which imposes no restrictions on underlying signal constellation compared with the existing differential space-time designs. This generalization potentially allows the spectral efficiency to be increased by carrying information not only on phases but also on amplitudes. We then derive a Noncoherent decoder (NCD) for fiat Rayleigh fading channels. We show that NCD may recover data symbols with full antenna diversity and linear complexity at high signal-to-noise ratio. Particularly, while three kinds of conventional signal constellations are used in GDSTBC, we derive the simplified versions of NCDs which can effectively reduce the cost of implementation.