Cooperative mobile-to-mobile communications over double Nakagami-m fading channels
Cooperative mobile-to-mobile communications over double Nakagami-m fading channels
复制标题
双 Nakagami-m 衰落信道上的协作移动到移动通信
DOI：
10.1049/iet-com.2012.0215
复制
发表时间：
2012-12-18
影响因子：
1.6
通讯作者：
Zhang, N.
中科院分区：
文献类型：
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作者：
Gong, F. K.;Ye, P.;Zhang, N.
双Nakagami-m衰落模型可用于提供移动到移动的（M2M）信道的真实描述。基于矩生成函数（MGF）方法推导了基于多移动中继的M2M系统的误符号概率（SEP）表达式。在较好的性能和较低的复杂度的考虑下，解码和转发（DF）和放大和转发（AF）协议在这项研究中进行了讨论。对于自适应DF（ADF）中继，除了精确的SEP公式推导出渐近SEP在高信噪比制度。进一步分析了信道估计误差对非理想信道估计的影响。对于固定增益AF（FAF）中继，作者提出了近似SEP和渐近SEP来表示合作增益。对于L个移动的继电器，在独立同分布的假设下（i.i.d）源-中继信道和i.i.d中继-目的信道，本文证明了L × min的渐近分集阶对于ADF-M2M和FAF-M2M方案，可以分别实现（mRD，1，mRD，2）+ min（mSD，1，mSD，2）和L × min（mSR，1，mSR，2，mRD，1，mRD，2）+ min（mSD，1，mSD，2）。仿真结果验证了分析结果。
Double Nakagami-m fading model can be used to provide a realistic description of the mobile-to-mobile (M2M) channel. The moment generating function (MGF)-based approach is used to derive the symbol error probability (SEP) expressions for the multiple-mobile-relay-based M2M system. Under the consideration of better performance and lower complexity, both decode-and-forward (DF) and amplify-and-forward (AF) protocols are addressed in this study. For adaptive DF (ADF) relaying, the asymptotic SEP at high signal-to-noise ratio regime in addition to the exact SEP formulations are derived. Furthermore, the impacts of channel estimation error for the insight of non-ideal channel estimation are analysed. For fixed-gain AF (FAF) relaying, the authors present approximate SEP and asymptotic SEP to indicate the cooperative gain. For L mobile relays and under the assumption of independent and identically distributed (i.i.d) source- relay channels and i.i.d relay-destination channels, it is shown in this paper that asymptotic diversity orders of L × min(mRD,1, mRD,2) + min(mSD,1, mSD,2) and L × min(mSR,1, mSR,2, mRD,1, mRD,2) + min(mSD,1, mSD,2) can be achieved for ADF-M2M and FAF-M2M schemes, respectively. Simulations are performed to verify the analytical results.