Patent ID: 8804478
Filing Date: 2014-08-12
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A method of generating a primary synchronization signal in a communication system, the method comprising: generating CAZAC (Constant Amplitude Zero Auto-Correlation) sequences with a length of N by repeating CAZAC sequences two or four times within one orthogonal frequency division multiplexing (OFDM) symbol of a time domain; performing at least a DFT (Discrete Fourier Transform) operation or an FFT (Fast Fourier Transform) operation for the CAZAC sequences with the length of N; performing an IDFT (Inverse Discrete Fourier Transform) operation for the CAZAC sequences on which the DFT is performed or performing an IFFT (Inverse Fast Fourier Transform) operation for the CAZAC sequences on which the FFT is performed; circular shifting in a frequency domain the CAZAC sequences on which the IDFT or IFFT is performed; generating the primary synchronization signal using the circular shifted CAZAC sequences; multiplexing the generated primary synchronization signal with a secondary synchronization signal by a TDM (Time Division Multiplexing) scheme in a specific time duration; and transmitting the multiplexed primary synchronization signal, wherein CAZAC sequences with a length of 36 in the time domain are repeated twice, and wherein values of the CAZAC sequences with the length of 36 include real values and imaginary values and are represented as: