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一種新的自適應窄帶干擾抑制在直擴超寬帶系統(tǒng)中的應用

梁中華,  朱世華,  王紹鵬

梁中華, 朱世華, 王紹鵬. 一種新的自適應窄帶干擾抑制在直擴超寬帶系統(tǒng)中的應用[J]. 電子與信息學報, 2006, 28(10): 1842-1845.
引用本文: 梁中華, 朱世華, 王紹鵬. 一種新的自適應窄帶干擾抑制在直擴超寬帶系統(tǒng)中的應用[J]. 電子與信息學報, 2006, 28(10): 1842-1845.
Liang Zhong-hua, Zhu Shi-hua, Wang Shao-peng. A Novel Adaptive Narrowband Interference Mitigation Scheme for DS-UWB Systems[J]. Journal of Electronics & Information Technology, 2006, 28(10): 1842-1845.
Citation: Liang Zhong-hua, Zhu Shi-hua, Wang Shao-peng. A Novel Adaptive Narrowband Interference Mitigation Scheme for DS-UWB Systems[J]. Journal of Electronics & Information Technology, 2006, 28(10): 1842-1845.

一種新的自適應窄帶干擾抑制在直擴超寬帶系統(tǒng)中的應用

A Novel Adaptive Narrowband Interference Mitigation Scheme for DS-UWB Systems

  • 摘要: 基于目標函數(shù)的最優(yōu)化問題與求解線性方程組的等價性，該文針對直擴超寬帶(DS-UWB)系統(tǒng)提出了一種新的自適應窄帶干擾抑制方案。該方案把最優(yōu)化模型轉(zhuǎn)化為線性方程組的形式，并用一種有效的迭代方法即共軛梯度(Conjugate Gradient, CG)算法來實現(xiàn)自適應濾波。理論分析及計算機仿真結(jié)果表明，與現(xiàn)有的窄帶干擾抑制方案相比，該文提出的方案具有更高的性價比，因此在低功耗、低成本及簡易實用的室內(nèi)超寬帶應用場合，適合作為一種可選的折衷方案。
    Abstract: An adaptive NarrowBand Interference (NBI) suppression approach is proposed for DS-UWB systems. Based on the equivalence between the objective function optimization and linear equations, the proposed scheme translates the optimization model into linear equations and then performs adaptive filtering by employing an effective iterative method for linear equations, namely Conjugate Gradient (CG) algorithm. Theoretical analysis and simulation results show that, compared with the traditional NBI mitigation schemes, the proposed scheme can achieve a superior performance-to-cost ratio, and therefore can be considered as a compromised candidate for low cost, low power consumption and low complexity indoor UWB application scenarios.
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  • FCC. Revision of part 15 of the commissions rules regarding ultra-wideband transmission systems. Release, ET Docket 98- 153. Feb. 2003.[2]Boubaker N, Letaief K B. A low complexity MMSE-RAKE receiver in a realistic UWB channel and in the presence of NBI. IEEE WCNC 2003, New Orleans, Louisiana, United States, 2003: 233-237.[3]Chu Xiaoli, Murch R D. The effect of NBI on UWB time-hopping systems[J].IEEE Trans. on Wireless Communications.2004, 3(5):1431-[4]Bergel I, Fishler E, Messer H. Narrowband interference mitigation in impulse radio[J].IEEE Trans. on Communications.2005, 53(8):1278-1282[5]Li Qinghua, Rusch L A. Multiuser detection for DS-CDMA UWB in the home environment[J].IEEE Journal on Selected Areas in Communications.2002, 20(9):1701-1711[6]Boray G K, Srinath M D. Conjugate gradient techniques for adaptive filtering. IEEE Trans. on Circuits and Systems, 1992, 39(1): 1-10.[7]Haykin S. Adaptive Filter Theory. 4th ed. NJ: Prentice-Hall, 2002: 94-101, 231-235, 436-463.[8]Bonnans J F, et al.. Numerical Optimization: Theoretical and Practical Aspects. New York: Springer, 2003: 26-27.[9]Barth T, Manteuffel T. Multiple recursion conjugate gradient algorithms Part I: Sufficient conditions[J].SIAM Journal on Matrix Analysis and Applications.2000, 21(3):768-796[10]Pi Shengchang, Willson A N. Analysis of conjugate gradient algorithms for adaptive filtering[J].IEEE Trans. on Signal Processing.2000, 48(2):409-418[11]Poor H V, Verdu S. Probability of error in MMSE multiuser detection[J].IEEE Trans. on Information Theory.1997, 43(3):858-[12]Foerster J, et al.. Channel modeling sub-committee report final. IEEE P802.15 Wireless Personal Area Networks, P802.15- 02/490rl-SG3a, Feb.2003.
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出版歷程
  • 收稿日期:  2005-12-26
  • 修回日期:  2006-06-20
  • 刊出日期:  2006-10-19

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