Radio Access Technologies for Fifth Generation Mobile Communications System: Review of Recent Research and Developments in Japan

Abstract

SUMMARY As the demand for higher transmission rates and spectral efficiency is steadily increasing, the research and development of novel mobile communication systems has gained momentum. This paper focuses on providing a comprehensive survey of research and development activities on fifth generation mobile communication systems in Japan. We try to survey a vast area of wireless communication systems and the developments that led to future 5G systems.

On the Bit Error Probability of OFDM and FBMC-OQAM Systems in Rayleigh and Rician Multipath Fading Channels

“…as (25) and 26 The BEP of the 4-PAM signal can then be obtained by (15)(16)(17) and (19). In the following section, we will provide the general BEP expressions for PAM signals with different constellation orders.…”

“…The expressions above can be greatly simplified for the doubly-flat channels if there is no synchronization error at the receiver. Owing to the absence of ICI and ISI in this case, we do not need to evaluate the interference caused by the other data symbols; thus, the numerical calculation process in (19) is not required. F Re, x m, n (λ, x m,n ) can be calculated directly according to (23) by making the variable substitution:…”

“…The Rician channel is another important and more general channel model by the truth that there is likely to be a direct path component, i.e., the line of sight (LOS) path, in many practical environments. This phenomenon is strengthened with the trend toward higher frequency band usage [19] and in some specific communication scenarios expected in the future, such as D2D communications, where the beam width of the antenna and the distance between the transceivers may both be much limited [20], [21]. Therefore, in this study we aim to develop a general analytical framework for BEP evaluation that covers both Rayleigh and Rician fading, flat and doubly-selective channels, and FBMC-OQAM and OFDM systems.…”