Patent ID: 8411661

Claim:
A method of generating a Single-Carrier Frequency Division Multiple Access (SC-FDMA) signal having a transmission bandwidth and a Constant Amplitude Zero-Autocorrelation (CAZAC) sequence of length N CAZAC , wherein the SC-FDMA signal has a time-domain formulation with a term representative of an Inverse Discrete Fourier Transform (IDFT) of length M, where M>N CAZAC , the method comprising the steps of: providing a frequency-domain representation of the CAZAC sequence; mapping the frequency-domain representation of the CAZAC sequence to N CAZAC of M SEQ frequency points, where N CAZAC <M SEQ <M; filling the remaining M SEQ −N CAZAC frequency points with zeros to obtain M SEQ frequency-domain samples; applying an IDFT of size M SEQ to the resulting frequency-domain samples to obtain a sub-sampled time-domain representation of the CAZAC sequence; and up-sampling the sub-sampled time-domain representation of the CAZAC sequence according to the transmission bandwidth to generate the SC-FDMA signal.