A scalable subband subsampled radio architecture for millimeter wave communications

Millimeter wave communications is a promising technology for future multi-Gbps wireless networks. However, the wide bandwidth and high sampling rate requirement involved leads to significant power consumption in the communication systems. In this paper we propose a subband based subsampled system architecture for indoor millimeter wave communications with a primary objective of improving energy efficiency in the transceiver with scalable data rates and multi-user support for varying Quality of Service (QoS) requirements. An optimum bandwidth partitioning scheme in support of proposed system architecture is also presented. Subbanding in association with orthogonal spreading codes enables the reduction of sampling rate requirement at the receiver, resulting in significant power savings for medium data rate communication systems. The BER simulation results for variable data rate, number of users, and QoS support are presented for the proposed scheme.

I. Introduction

The millimeter wave (mmWave) communications in 60 GHz is considered as a key technology for fifth generation wireless networks [1], [2]. The release of 7 GHz bandwidth around 60 GHz by Federal Commission for Communications (FCC) [3], the developments in circuit technology for mmWave along with new application requirements have triggered the development of standards such as IEEE 802.15.3c [4], and IEEE 802.11ad [5].