arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0901.3134cs.ITmath.IT
收藏

固定速率无线传输在受限和信道不确定性下的能量有效性

Energy Efficiency of Fixed-Rate Wireless Transmissions under Queueing Constraints and Channel Uncertainty

Deli Qiao, Mustafa Cenk Gursoy, Senem Velipasalar

摘要:

研究了在信道不确定性和传输约束条件下,固定速率传输的能量效率问题。假设发射机和接收机在传输之前都没有信道侧信息。信道系数在接收机处借助于训练符号经由最小均方误差(MMSE)估计来估计。进一步假设系统在缓冲区违规概率限制形式的统计约束下运行。确定分配给训练的功率的最佳分数。频谱效率-比特能量权衡分析在低功耗和宽带制度,采用有效容量公式。特别是,它示出的位能量增加,而没有约束,在低功率政权的平均功率为零。另一方面,它被证明,比特能量减少到其最小值,在宽带制度的可用带宽增加。对于这种情况下,表达式的最小比特能量和宽带斜率。总的来说,能源成本的渠道不确定性和排队的限制。

英文摘要:

Energy efficiency of fixed-rate transmissions is studied in the presence of queueing constraints and channel uncertainty. It is assumed that neither the transmitter nor the receiver has channel side information prior to transmission. The channel coefficients are estimated at the receiver via minimum mean-square-error (MMSE) estimation with the aid of training symbols. It is further assumed that the system operates under statistical queueing constraints in the form of limitations on buffer violation probabilities. The optimal fraction of of power allocated to training is identified. Spectral efficiency--bit energy tradeoff is analyzed in the low-power and wideband regimes by employing the effective capacity formulation. In particular, it is shown that the bit energy increases without bound in the low-power regime as the average power vanishes. On the other hand, it is proven that the bit energy diminishes to its minimum value in the wideband regime as the available bandwidth increases. For this case, expressions for the minimum bit energy and wideband slope are derived. Overall, energy costs of channel uncertainty and queueing constraints are identified.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑