SIGNAL REGION CHARACTERIZATION AND EXACT PHASE RECOVERY FOR CONSTANT ENVELOPE PRECODING IN SINGLE-USER LARGE-SCALE MISO CHANNELS
Refereed conference paper presented and published in conference proceedings

香港中文大學研究人員

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摘要This paper considers constant envelope (CE) precoding in single-user MISO downlink systems. CE precoding is a transmission scheme recently proposed for very large antenna arrays, in which the use of highly power-efficient RF amplifiers is a requirement. There are two important issues in CE precoding, namely the characterization of the region of all possible noise-free receive signals, and the recovery of the phases of the transmitting signal. An existing result by Mohammed and Larsson showed that the noise-free receive signal region can be geometrically interpreted as a region between two circles centered at the origin of the complex plane. However, this result did not prove the expression of the radius of the inner circle. We provide a new analysis approach to characterize the noise-free receive signal region. Our result shows that the radius of the inner circle has a simple closed-form expression, there by completing the result by Mohammed and Larsson. In addition, we propose an algorithm that can recover the phases of the transmitting signal exactly with a complexity linear in the number of antennas. Simulation results show that the proposed method can be significantly faster than an existing phase recovery algorithm.
著者Pan JX, Ma WK
會議名稱IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)
會議開始日26.05.2013
會議完結日31.05.2013
會議地點Vancouver
會議國家/地區加拿大
詳細描述organized by IEEE,
出版年份2013
月份1
日期1
出版社IEEE
頁次5065 - 5069
電子國際標準書號978-1-4799-0356-6
國際標準期刊號1520-6149
語言英式英語
關鍵詞constant envelope; doughnut channel; Large antenna array
Web of Science 學科類別Acoustics; Engineering; Engineering, Electrical & Electronic

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