Method and apparatus for adjusting symbol timing and/or symbol positioning of a receive burst of data within a radio receiver
View Patent ↗A method and apparatus for adjusting symbol timing and/or symbol interval range of a receive burst of data within a radio receiver include processing that begins by receiving a radio frequency signal that includes bursts of data. The process then continues by determining a frequency offset for the burst of data based on a difference between the transmitter processing rate and a receiver processing rate. The processing then continues by determining a symbol timing offset and/or a symbol interval range offset based on the frequency offset. The process then proceeds by adjusting the initial symbol positioning and/or the symbol interval range offset of a burst of data based on the symbol timing offset.
1. A method for adjusting symbol timing of a received burst of data within a radio receiver, the method comprises:
receiving a radio frequency signal that includes the received burst of data, wherein the radio frequency signal and the received burst of data were processed in accordance with a transmitter processing rate;
determining a frequency offset for the received burst of data based on a difference between the transmitter processing rate and a receiver processing rate of the radio receiver;
determining a symbol timing offset based on the frequency offset; and
adjusting initial symbol positioning of the received burst of data based on the symbol timing offset.
2. The method of claim 1 , wherein the determining the symbol timing offset comprises:
determining a scaling factor based on duration of the received burst of data and the frequency offset; and
determining the symbol timing offset based on the scaling factor.
3. The method of claim 1 , wherein the adjusting the initial symbol positioning comprises:
adjusting the initial symbol positioning by an amount proportional to the symbol timing offset.
4. The method of claim 1 further comprises:
adjusting initial symbol interval range based on the symbol timing offset.
5. The method of claim 4 further comprises: adjusting the initial symbol interval range based on a symbol interval range offset and duration of the received burst of data.
6. The method of claim 4 further comprises:
monitoring drift of the initial symbol interval range; and
when the drift reaches a drift limit, adjusting the initial symbol interval range to produce an adjusted symbol interval range.
7. The method of claim 1 , wherein the determining the frequency offset for the received burst of data further comprises at least one of:
determining the frequency offset based on a difference between a transmitter local oscillation and a receiver local oscillation; and
determining the frequency offset based on a difference between a transmitter processing rate and a receiver processing rate.
8. A method for adjusting symbol interval range during sampling of a received burst of data within a radio receiver, the method comprises:
receiving a radio frequency signal that includes the received burst of data, wherein the radio frequency signal and the received burst of data were processed in accordance with a transmitter processing rate;
determining a frequency offset for the received burst of data based on a difference between the transmitter processing rate and a receiver processing rate of the radio receiver;
determining a symbol interval range offset based on the frequency offset; and
adjusting an initial symbol interval range for sampling the received burst of data based on the symbol interval range offset.
9. The method of claim 8 , wherein the determining the symbol interval range offset comprises:
determining a scaling factor based on duration of the received burst of data and the frequency offset; and
determining the symbol interval range offset based on the scaling factor.
10. The method of claim 8 further comprises:
adjusting initial symbol timing positioning based on the symbol interval range offset.
11. The method of claim 10 further comprises: adjusting the initial symbol interval range based on the symbol interval range offset and duration of the received burst of data.
12. The method of claim 10 further comprises:
monitoring drift of the initial symbol interval range; and
when the drift reaches a drift limit, adjusting the initial symbol interval range to produce an adjusted symbol interval range.
13. The method of claim 8 , wherein the determining the frequency offset for the received burst of data further comprises at least one of:
determining the frequency offset based on a difference between a transmitter local oscillation and a receiver local oscillation; and
determining the frequency offset based on a difference between a transmitter processing rate and a receiver processing rate.
14. A radio receiver comprises:
antenna for receiving a radio frequency signal, wherein the radio frequency signal includes a burst of data, wherein the radio frequency signal and the received burst of data were processed in accordance with a transmitter processing rate;
down-conversion module operably coupled to convert the radio frequency signal into a baseband signal in accordance with a receiver local oscillation;
demodulation setup module operable to:
determine a frequency offset for the burst of data based on a difference between the transmitter processing rate and a receiver processing rate of the radio receiver, wherein the receiver processing rate relates to the receiver local oscillation;
determine a symbol timing offset based on the frequency offset; and
establish an initial symbol positioning for sampling the baseband signal based on the symbol timing offset; and
demodulation module operably coupled to recapture the data from the baseband signal utilizing the initial symbol positioning.
15. The radio receiver of claim 14 , wherein the demodulation setup module determines the symbol timing offset by:
determining a scaling factor based on duration of the received burst of data and the frequency offset; and
determining the symbol timing offset based on the scaling factor.
16. The radio receiver of claim 14 , wherein the demodulation setup module adjusts the initial symbol positioning by:
adjusting the initial symbol positioning by an amount proportional to the symbol timing offset.
17. The radio receiver of claim 14 , wherein the demodulation setup module further functions to:
adjust initial symbol interval range based on the symbol timing offset.
18. The radio receiver of claim 17 , wherein the demodulation setup module further functions to:
adjust the initial symbol interval range based on a symbol interval range offset and duration of the received burst of data.
19. The radio receiver of claim 17 , wherein the demodulation setup module further functions to:
monitor drift of the initial symbol interval range; and
when the drift reaches a drift limit, adjust the initial symbol interval range to produce an adjusted symbol interval range.
20. The radio receiver of claim 14 , wherein the demodulation setup module further functions to determine the frequency offset for the received burst of data by at least one of:
determining the frequency offset based on a difference between a transmitter local oscillation and the receiver local oscillation; and
determining the frequency offset based on a difference between a transmitter processing rate and a receiver processing rate.
21. A radio receiver comprises:
antenna for receiving a radio frequency signal, wherein the radio frequency signal includes a burst of data, wherein the radio frequency signal and the received burst of data were processed in accordance with a transmitter processing rate;
down-conversion module operably coupled to convert the radio frequency signal into a baseband signal in accordance with a receiver local oscillation;
demodulation setup module operable to:
determine a frequency offset for the burst of data based on a difference between the transmitter processing rate and a receiver processing rate of the radio receiver, wherein the receiver processing rate relates to the receiver local oscillation;
determine a symbol interval range offset based on the frequency offset; and
adjust an initial symbol interval range for sampling the received burst of data based on the symbol interval range offset; and
demodulation module operably coupled to recapture the data from the baseband signal utilizing the initial symbol interval range.
22. The radio receiver of claim 21 , wherein the demodulation setup module functions to determine the symbol interval range offset by:
determining a scaling factor based on duration of the received burst of data and the frequency offset; and
determining the symbol interval range offset based on the scaling factor.
23. The radio receiver of claim 21 , wherein the demodulation setup module further functions to:
adjust initial symbol timing positioning based on the symbol interval range offset.
24. The radio receiver of claim 23 , wherein the demodulation setup module further functions to:
adjust the initial symbol interval range based on the symbol interval range offset and duration of the received burst of data.
25. The radio receiver of claim 23 , wherein the demodulation setup module further functions to:
monitor drift of the initial symbol interval range; and
when the drift reaches a drift limit, adjust the initial symbol interval range to produce an adjusted symbol interval range.
26. The radio receiver of claim 21 , wherein the demodulation setup module further functions to determine the frequency offset for the received burst of data by at least one of:
determining the frequency offset based on a difference between a transmitter local oscillation and the receiver local oscillation; and
determining the frequency offset based on a difference between the transmitter processing rate and a receiver processing rate.