可提供高頻譜緊密度與最佳通道估測性能之正交分頻多工領航信號的設計

Pilot Sequence Design for Spectral Compactness and Channel Estimation in OFDM

楊智凱(Chih-Kai Yang)

指導教授 ： 鐘嘉德

共同指導教授 ： 陳維昌(Wei-Chang Chen)

國立臺灣大學/電機資訊學院/電信工程學研究所/碩士(2019年)

https://doi.org/10.6342/NTU201900957

摘要

在現行標準中的領航信號有著較緩慢衰落的頻譜旁波衰落速度，進而使得鄰近的通道產生干擾，對此有些文章提出相對應的解決方法，來讓領航信號具有快速旁波衰減的特性，然而這些方法會受限於一些條件而使得應用範圍不廣泛，像是旁波衰減速度會受限於領航序列長度的2的因數個數，又或者是會受限於各種的系統參數。為了克服這項困難，在此篇文章中提出兩個新的設計方法，能將過去適用的情況被更加的擴展，同時又能確保兩種新方法所建構出來的領航信號，具備高頻譜緊密度與最佳通道估測的能力。

關鍵字

正交分頻多工 ； 領航信號 ； 通道估測 ； 旁波抑制 ； 頻譜緊密度

並列摘要

The pilot waveform that can suppress power spectral sidelobes while achieving accurate channel estimation is desirable for orthogonal frequency division multiplexing systems and standards. However, the conventional pilot waveforms either suffer large power spectral sidelobes or can suppress sidelobe power effectively only when the number of pilot subcarriers has a large positive integer power of two as a factor. To overcome the problem, two design procedures are proposed in the paper to construct spectrally compact pilot waveforms with optimal channel estimation even when the number of pilot subcarriers does not have a large positive integer power of two as a factor.

並列關鍵字

Orthogonal frequency division multiplexing ； pilot ； channel estimation ； sidelobe suppression

參考文獻

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[2] IEEE 802.11-2012, IEEE Standard for Information Technology- Telecommunications and Information Exchange Between Systems Local and Metropolitan Area Networks--Specific Requirements Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications, Mar. 2012.

[3] IEEE 802.16-2009, IEEE Standard for Local and Metropolitan Area Network, Part 16: Air Interface for Broadband Wireless Access Systems, May 2009.

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[5] IEEE 802.22-2011, Part 22: Cognitive Wireless RAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: Policies and Procedures for Operation in the TV Bands, Jul. 2011.