Abstract
In this paper, the quality of service (QoS) of massive MIMO wireless system with time division duplexing (TDD) protocol has been evaluated. Though employment of hundreds of antenna elements at base station (BS) promises many fold enhancement of degrees of freedom in the system, the complexity in channel estimation has also increased in same proportion. The spectrum overhead in massive MIMO system with conventional frequency division duplexing (FDD) is unmanageably high as it estimates both links separately. TDD protocol, though it is not popular in legacy wireless systems, may be best choice for massive MIMO as it reduces the spectrum overhead significantly by exploiting the reciprocity between channels for both the links. The QoS parameters like average sum-rate and outage probability are considered in this paper for performance evaluation of massive MIMO with TDD protocol has been evaluated in terms of system bit error rate and average sum-rate.
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