Pilot frequency acquisition based on a window of data samples

A method of acquiring frequency of a signal instance received in a wireless communication system, comprising:

• receiving a segment of data samples for processing, wherein the segment of data samples is a portion of a window of data samples having included therein the signal instance;
• rotating the data samples in accordance with a current frequency error estimate to provide frequency-translated data samples;
• deriving an updated frequency error estimate based on the frequency-translated data samples;
• and
• repeating the receiving, rotating, and deriving a plurality of times through the window of data samples until frequency acquisition is achieved for the signal instance or termination is reached.

A method of acquiring frequency of a signal instance in a CDMA communication system, comprising:

• receiving a segment of data samples for processing, wherein the segment of data samples is a portion of a window of data samples having included therein the signal instance, and wherein the duration of time covered by the window is shorter than the time required to achieve frequency acquisition;
• rotating the data samples in accordance with a current frequency error estimate to provide frequency-translated data samples;
• processing the frequency-translated data samples to provide one or more pilot symbols;
• deriving an updated frequency error estimate based on the one or more pilot symbols;
• and
• repeating the receiving, rotating, processing, and deriving a plurality of times through the window of data samples until frequency acquisition is achieved for the signal instance or termination is reached, wherein the window of data samples is processed one segment at a time and in a sequential order, from start to end of the window, for each of the plurality of times.

A method of recovering a paging indicator (PI) bit for a quick paging channel in a CDMA communication system, comprising:

• storing a window of data samples covering the PI bit;
• acquiring frequency of a signal instance by processing the window of data samples a plurality of times until frequency acquisition is achieved for the signal instance;
• and
• processing frequency-corrected data samples for the signal instance to recover the PI bit.

A memory communicatively coupled to a digital signal processing device (DSPD) capable of interpreting digital information to:

• receive a segment of data samples for processing, wherein the segment of data samples is a portion of a window of data samples having included therein a signal instance having a frequency to be acquired;
• rotate the data samples in accordance with a current frequency error estimate to provide frequency-translated data samples;
• derive an updated frequency error estimate based on the frequency-translated data samples;
• and
• repeat processing of the window of data samples a plurality of times until frequency acquisition is achieved for the signal instance or termination is reached.

A computer program product for acquiring a frequency of a signal instance received in a wireless communication system, comprising:

• code for receiving a segment of data samples for processing, wherein the segment of data samples is a portion of a window of data samples having included therein the signal instance;
• code for rotating the data samples in accordance with a current frequency error estimate to provide frequency-translated data samples;
• code for deriving an updated frequency error estimate based on the frequency-translated data samples;
• code for repeating the receiving, rotating, and deriving a plurality of times through the window of data samples until frequency acquisition is achieved for the signal instance or termination is reached;
• and
• a computer-usable medium for storing the codes:

A device in a wireless communication system, comprising:

• a sample buffer operative to store a window of data samples for a received signal;
• and
• a digital signal processor including
• a rotator operative to receive and rotate a segment of data samples in accordance with a current frequency error estimate for a signal instance in the received signal to provide frequency-translated data samples, wherein the segment of data samples is a portion of the window of data samples, and
• a frequency control loop operative to derive an updated frequency error estimate based on the frequency-translated data samples, wherein the rotator and frequency control loop are operative to process the window of data samples a plurality of times until frequency acquisition is achieved for the signal instance or termination is reached.