Pilot signal detection method and receiver
AssigneeSony Corporation
InventorsKatsuya Yamamoto, Nobuhiko Watanabe
Life of this patent
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Abstract
A pilot signal detection method and a receiver, in which a search window having a predetermined time width is generated at every substantially constant time interval, and pilot signals existing in search window thus generated are detected. The position of the search window of each period is set in accordance with the delay amount between the timing (T_ref) of the first pilot signal and the timing (T_last) of the last pilot signal detected in the immediately preceding search window.
Claims4
A pilot signal detection method for receiving a spectrum spread signal and detecting an arbitrary pilot signal from the spectrum spread signal thus received, comprising the steps of:
- generating a search window of a predetermined time width at every substantially constant period of time and detecting a pilot signal existing in the search window thus generated;
- and
- setting a position of a current search window corresponding to a distribution of pilot signals detected in an immediately preceding search window,
- wherein a delay amount between a first pilot signal and a last pilot signal detected in the immediately preceding search window is detected and, in accordance with the detected delay amount, the position of said current search window is set.
A receiver for receiving a spectrum spread signal and detecting an arbitrary pilot signal from said spectrum spread signal, comprising:
- search window setting means for generating a search window of a predetermined time width periodically at a substantially constant time interval;
- pilot signal detection means for detecting the pilot signal existing in a receiving signal in the search window generated by said search window setting means;
- search window position correction means for setting a window position generated by said search window setting means, in accordance with a distribution of pilot signals detected in an immediately preceding search window;
- and
- delay amount detection means for detecting a delay amount between the first and the last pilot signals detected in an immediately preceding search window by said pilot signal detection means,
- wherein a search window position corrected by said search window position correction means is set in accordance with the delay amount detected by said delay amount detection means.
Dependencies are inferred from the claim text.