In this paper, we analyze the effect of uplink and downlink training on the downlink achievable rate for massive MIMO systems with outdated channel. Even though both uplink and downlink training have the same training overhead, the achievable rate is more dominated by the uplink training than downlink training. As the number of antennas goes to infinity, the performance gain of the downlink training is negligible. This fact implies that non-coherent detection is more desirable for massive MIMO systems in terms of throughput. The rate loss caused by outdated channel is also dominated by the uplink training. Our analysis gives a good insight to implement practical massive MIMO systems.
|Title of host publication||2015 IEEE International Conference on Communications, ICC 2015|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||6|
|Publication status||Published - 2015 Sep 9|
|Event||IEEE International Conference on Communications, ICC 2015 - London, United Kingdom|
Duration: 2015 Jun 8 → 2015 Jun 12
|Name||IEEE International Conference on Communications|
|Other||IEEE International Conference on Communications, ICC 2015|
|Period||15/6/8 → 15/6/12|
Bibliographical notePublisher Copyright:
© 2015 IEEE.
All Science Journal Classification (ASJC) codes
- Computer Networks and Communications
- Electrical and Electronic Engineering