Feedback Strategies for Multiuser Systems (original) (raw)

Feedback Strategies for Wireless Communication, 2013

Abstract

The increasing demand for wireless multimedia has led to coordinated multicell transmission which can increase data rate and reduces outage in cellular systems by mitigating intercell interference (ICI). In order to mitigate ICI, adaptive power allocation and multiple antenna techniques are employed in the multicell networks. In this chapter, we describe limited and reduced feedback strategies for SISO and MISO based cooperative multicell framework in flat fading and frequency selective channels. Since the amount of feedback bits increases with the number of users and base stations, it is important to perform a selection at the user side. In addition to that, the cooperative networks are quite sensitive to the quality of the channel state information of serving and interfering base stations to eliminate inter-cell interference. We examine the limited feedback strategies for multiantenna multicell systems. The purpose is to quantize the CSI belonging to serving and interfering BSs by applying bit partitioning strategies based on different criteria. We illustrate the performance results for cooperative multicell systems with reduced and limited feedback strategies.

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