Low-Complexity Cell Search Algorithm for Interleaved Concatenation ML-Sequences in 3GPP-LTE Systems

Author

Liao, Chia-Chun ; Tsai, Pei-Yun ; Chiueh, Tzi-Dar

Author_Institution

Grad. Inst. of Electron. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

1

Issue

4

fYear

2012

fDate

8/1/2012 12:00:00 AM

Firstpage

280

Lastpage

283

Abstract

In this paper, we present a low-complexity cell-search algorithm and architecture for secondary synchronization signal in 3GPP-LTE downlink systems. Differential correlations are computed to remove common channel effects so that two sets of synchronization signals can be combined to obtain enhanced detection quality. To achieve low complexity, we further adopt one-bit quantization and exploit the properties of limited offset in the indices of the two maximal-length sequences. The arithmetic complexity of the proposed algorithm is significantly reduced while attaining similar detection performance comparable to the conventional schemes. Finally, hardware architecture of the proposed algorithm is presented to demonstrate feasibility and efficiency in the implementation.

Keywords

3G mobile communication; Long Term Evolution; radio links; 3GPP-LTE downlink system; arithmetic complexity; enhanced detection quality; interleaved concatenation ML-sequences; low complexity cell search algorithm; maximal length sequences; one-bit quantization; secondary synchronization signal; Algorithm design and analysis; Complexity theory; Computer architecture; Correlation; Microprocessors; Quantization; Synchronization; 3GPP-LTE; Cell search; ML-sequence; secondary synchronization signal;

fLanguage

English

Journal_Title

Wireless Communications Letters, IEEE

Publisher

ieee

ISSN

2162-2337

Type

jour

DOI

10.1109/WCL.2012.041612.110263

Filename

6189011