Secondary Synchronization Signal Detection with Interference Cancelation for LTE
First Claim
1. A method for detecting a first and second secondary synchronization signal (SSS) sequence in a received signal, the method comprising:
- detecting the first SSS sequence in the received signal;
estimating a channel over which the first SSS sequence is received;
estimating a contribution of the first SSS sequence to the received signal using the channel estimate;
canceling the contribution estimate of the first SSS sequence from the received signal to generate an interference canceled received signal; and
detecting the second SSS sequence using the interference canceled received signal.
6 Assignments
0 Petitions
Accused Products
Abstract
Methods and systems for removing interference from strongly powered SSS sequences in a received signal so that comparatively weakly powered SSS sequences in the received signal can be detected are disclosed. The methods and systems can perform a first cell search using the received signal to detect a strongly powered SSS sequence. Using a known SSS sequence corresponding to the strongly powered SSS sequence, the channel over which the strongly powered SSS sequence is received can be estimated. The estimated channel can then be used to determine the contribution of the strongly powered SSS and PSS sequence to the received signal so that it can be canceled. With the contribution of the strongly powered SSS and PSS sequence canceled from the received signal, a second cell search can be performed using the received signal to detect a weakly powered SSS sequence.
-
Citations
20 Claims
-
1. A method for detecting a first and second secondary synchronization signal (SSS) sequence in a received signal, the method comprising:
-
detecting the first SSS sequence in the received signal; estimating a channel over which the first SSS sequence is received; estimating a contribution of the first SSS sequence to the received signal using the channel estimate; canceling the contribution estimate of the first SSS sequence from the received signal to generate an interference canceled received signal; and detecting the second SSS sequence using the interference canceled received signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. 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; 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 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. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
-
17. 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; 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. - View Dependent Claims (18, 19, 20)
-
Specification