Adaptive Feedback Scheme on K-Cell MISO Interfering Broadcast Channel with Limited Feedback

作者：Lee Namyoon^*; Shin Wonjae

来源：IEEE Transactions on Wireless Communications, 2011, 10(2): 401-406.

DOI：10.1109/TWC.2010.112310.100543

• Adaptive feedback
• multicell interfering broadcast channel
• multiple antennas

In this paper, we study a K-cell multiple input single-output interfering broadcast channel (MISO-IFBC) with finite rate feedback. In this channel, we first derive the rate loss due to the quantization error by considering both a coordinated zero-forcing beamforming and random vector quantization method. Using this result, feedback bits allocation methods are proposed to minimize the performance degradation in K-cell MISO-IFBC. Furthermore, we investigate how many feedback bits per user are necessary to maintain the optimal multiplexing gain in K-cell MISO-IFBC. Through numerical evaluations, we show that our proposed feedback bits allocation strategy provides significant gain compared to a trivial bits allocation scheme.

• 出版日期2011-2