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 use in a radio receiver for adjusting an initial symbol positioning of a received burst of data from a transmitter, the method comprises:
adjusting the initial symbol positioning of the received burst of data based on a difference between a processing rate of the transmitter and a processing rate of the radio receiver, wherein the adjusting the initial symbol positioning comprises:
determining a frequency offset for the received burst of data based on the difference between the processing rate of the transmitter and the processing rate of the radio receiver;
determining a symbol timing offset based on the frequency offset; and
adjusting the initial symbol positioning by an amount proportional to 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 determining the frequency offset for the received burst of data comprises:
determining the frequency offset based on a difference between a transmitter local oscillation of the transmitter and a receiver local oscillation of the radio receiver.
4. A method for use in a radio receiver for adjusting an initial symbol interval range of a received burst of data from a transmitter, the method comprises:
adjusting the initial symbol interval range of the received burst of data based on a difference between a processing rate of the transmitter and a processing rate of the radio receiver, wherein the adjusting the initial symbol interval range comprises:
determining a frequency offset for the received burst of data based on the difference between the processing rate of the transmitter and the processing rate of the radio receiver;
determining a symbol timing offset based on the frequency offset; and
adjusting the 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. A method for use in a radio receiver for adjusting an initial symbol interval range of a received burst of data from a transmitter, the method comprises:
monitoring drift of the initial symbol interval range of the received burst of data in the radio receiver;
when the drift reaches a drift limit, adjusting, in the radio receiver, the initial symbol interval range to produce an adjusted symbol interval range;
determining a frequency offset for the received burst of data based on a difference between a processing rate of the transmitter and a processing rate of the radio receiver;
determining a symbol timing offset based on the frequency offset; and
adjusting an initial symbol positioning by an amount proportional to the symbol timing offset.
8. The method of claim 7 , 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.
9. The method of claim 7 , wherein the determining the frequency offset for the received burst of data comprises:
determining the frequency offset based on a difference between a transmitter local oscillation of the transmitter and a receiver local oscillation of the radio receiver.
10. A method for use in a radio receiver for adjusting a symbol interval of a received burst of data from a transmitter, the method comprises:
monitoring drift of the symbol interval of the received burst of data in the radio receiver;
when the drift reaches a drift limit, adjusting, in the radio receiver, the symbol interval to produce an adjusted symbol interval;
determining a frequency offset for the received burst of data based on a difference between a transmitter processing rate of the transmitter and a receiver processing rate of the radio receiver;
determining a symbol timing offset based on the frequency offset; and
adjusting an initial symbol interval range of the symbol interval based on the symbol timing offset.
11. The method of claim 10 further comprises:
adjusting the initial symbol interval range based on a symbol interval range offset and duration of the received burst of data.