Achievable Channel Cutoff Rate and Bandwidth Efficiency in Indoor Wireless Environments

作者：Dey, Indrakshi^*; Tsiftsis, Theodoros A.; Rowell, Corbett

来源：IEEE Transactions on Vehicular Technology, 2016, 65(12): 10074-10079.

DOI：10.1109/TVT.2016.2553358

• Bandwidth efficiency
• capacity
• channel cut-off rate
• joint fading two-path shadowing (JFTS)

In this paper, analytical expressions for the channel capacity, channel cutoff rate, and achievable bandwidth efficiency associated with M-ary signaling and Joint Fading Two-path Shadowing (JFTS) fading/shadowing channel model that characterize mobility-constrained indoor propagation scenarios are derived. Expressions for the bandwidth efficiency of a JFTS fading channel involve infinite-series summation since the probability density function of the JFTS signal-to-noise ratio (SNR) contains infinite series. We derive lower and upper bounds on the errors resulting from truncating the infinite series in the bandwidth efficiency expression. The cutoff rate and bandwidth efficiency analysis can be used to demonstrate how much throughput can be practically achieved when M-ary signaling techniques are implemented over indoor composite fading/shadowing channel conditions. Simulation results show that in order to achieve 3 bits/symbol, the average SNR for a 16-quadrature-amplitude-modulation (16-QAM) system requires almost 10 dB more for a JFTS channel model compared with a traditional Rayleigh channel model, thus reinforcing the necessity of using proper channel models for indoor communication systems.

• 出版日期2016-12