Lei LI（李磊）, En-chang SUN（孙恩昌）, Yan-hua ZHANG（张延华）
School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China
Abstract-In this paper, a group of methods in reducing Peak t o Average Power Ratio (PAPR) in 3GPP-LTE uplink Single-Carrier Frequency Divis ion Multiple Access (SC-FDMA) using Constant Amplitude Zero Auto-Correlation S equences(CAZAC) sequences were proposed. The authors discussed the methods of re ducing PAPR using pilot sequences and detailed schemes. Then they investigated s everal CAZAC sequences, mainly about phase shifted sequences, such as Chu sequen ce, Frank sequence and Golomb sequence. They also compared the differences betwe en various kinds of pilot sequence positions. Compared to simple binary sequence s, CAZAC has a great improvement in peak power reduction. With respect to pilot sequence orders and pilot density, all three CAZAC sequences have similar perfor mances, which is an advantage in designing SC-FDMA systems.
Key words-PAPR; SC-FDMA; CAZAC; pilot sequence
Manuscript Number: 1674-8042(2011)02-0164-06
dio: 10.3969/j.issn.1674-8042.2011.02.16
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