Secondary synchronization signal detection with interference cancelation for LTE

A terminal for detecting a first and second secondary synchronization signal (SSS) sequence in a received signal, the terminal comprising:

• a channel estimator configured to estimate a channel over which the first SSS sequence is received as an element wise product of a frequency domain representation of samples of the received signal and a known SSS sequence corresponding to the first SSS sequence, wherein a value of the element wise product at a DC tone index is determined based on a value of the element wise product at a different tone index than the DC tone index;
• an interference canceler configured to generate an interference canceled received signal by:
• estimating a contribution of the first SSS sequence to the received signal using the channel estimate and canceling the contribution estimate of the first SSS sequence from the received signal, and
• estimating a contribution of a first primary synchronization signal (PSS) sequence to the received signal using the channel estimate and canceling the contribution estimate of the first PSS sequence from the received signal;
• and
• a detector configured to detect the second SSS sequence using the interference canceled received signal.

A terminal for detecting a first and second sequence in a received signal, the terminal comprising:

• a channel estimator configured to estimate a channel over which the first sequence is received as an element wise product of a frequency domain representation of samples of the received signal and a known sequence corresponding to the first sequence, wherein a value of the element wise product at a DC tone index is determined based on a value of the element wise product at a different tone index than the DC tone index;
• an interference canceler configured to estimate a contribution of the first sequence to the received signal using the channel estimate and to cancel the contribution estimate from the received signal to generate an interference canceled received signal;
• and
• a detector configured to detect the second sequence using the interference canceled received signal.