On the use of TCH sequences for synchronization and channel estimation in MIMO systems

Author

Silva, João Carlos ; Silva, Hugo ; Dinis, Rui ; Gomes, Eunice ; Souto, Nuno

Author_Institution

Inst. de Telecomun., ISCTE, Lisbon, Portugal

fYear

2010

fDate

13-15 Dec. 2010

Firstpage

1

Lastpage

5

Abstract

TCH (Tomlinson, Cercas and Hughes) sequences have been studied for code-spreading and channel coding, but their true purpose is for synchronization and channel estimation. This is due to their property of being (virtually) orthogonal to all of their sequences obtained via circular shifts, and the use of the FFT (Fast Fourier Transform) for decoding. This property is extremely useful for time-offset synchronization (there is a distinct “peak” only when both sequences are aligned), and for dispersive channel-estimation (since the multipath-taps are now orthogonal to each other). This work will focus essential on different TCH-based sequences for performing synchronization, channel and noise estimation for OFDM (Orthogonal Frequency Domain Modulation)/SC-FDE (Single-Carrier Frequency Domain Equalization) systems. Results for MIMO (Multiple Input, Multiple Output) can be easily extrapolated from the simulation results.

Keywords

MIMO communication; OFDM modulation; channel coding; channel estimation; decoding; equalisers; fast Fourier transforms; synchronisation; MIMO systems; OFDM; TCH sequences; Tomlinson, Cercas and Hughes sequences; channel coding; decoding; dispersive channel estimation; fast Fourier transform; multipath taps; noise estimation; orthogonal frequency domain modulation; orthogonal sequences; single-carrier frequency domain equalization; time-offset synchronization; Channel estimation; Correlation; Estimation; Noise; OFDM; Polynomials; Synchronization; Channel estimation; Synchronization; TCH sequences; frequency-domain equalization; single-carrier modulations;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing and Communication Systems (ICSPCS), 2010 4th International Conference on

Conference_Location

Gold Coast, QLD

Print_ISBN

978-1-4244-7908-5

Electronic_ISBN

978-1-4244-7906-1

Type

conf

DOI

10.1109/ICSPCS.2010.5709738

Filename

5709738