Method and system to reduce peak to average power ratio in multi-carrier modulation receivers
Provided is a method for performing channel estimation in an Orthogonal Frequency Division Multiplexed (OFDM) signal. The method includes performing the channel estimation based upon use of reserved tone channel carriers.
1. A method for performing channel estimation for an Orthogonal Frequency Division Multiplexed (OFDM) signal, the method comprising:
assigning one of a set of non-arbitrary reserved tone values to a reserved tone channel carrier based on a predetermined peak-to-average-power ratio (PAPR) threshold;
producing a second set of non-arbitrary reserved tone values by filtering the set of non-arbitrary reserved tone values; and
performing the channel estimation based on the reserved tone channel carrier.
2. The method of claim 1 , wherein the set of non-arbitrary reserved tone values comprises at least a subset of pilot tone values.
3. The method of claim 1 , wherein the channel estimation is performed in a receiver configured to receive the OFDM signal.
4. An apparatus for use in performing channel estimation in an orthogonal frequency multiplexing (OFDM) system, comprising:
a receiver module configured to:
receive an OFDM signal including a reserved tone channel carrier;
perform the channel estimation based on one of a set of non-arbitrary reserved tone values assigned to the reserved tone channel carrier, the one of the set of non-arbitrary reserved tone values being assigned to the reserved tone channel carrier based on a predetermined peak-to-average-power ratio (PAPR) threshold; and
produce a second set of non-arbitrary reserved tone values by filtering the set of non-arbitrary reserved tone values.
5. An apparatus for performing channel estimation for an Orthogonal Frequency Division Multiplexed (OFDM) signal, the apparatus comprising:
means for assigning one of a set of non-arbitrary reserved tone values to a reserved tone channel carrier based on a predetermined peak-to-average-power ratio (PAPR) threshold;
means for producing a second set of non-arbitrary reserved tone values by filtering the set of non-arbitrary reserved tone values; and
means for performing the channel estimation based on the reserved tone channel carrier.
6. A non-transitory computer readable medium carrying one or more sequences of one or more instructions for execution by one or more processors to perform a method for providing channel estimation for an Orthogonal Frequency Division Multiplexed (OFDM) signal, the instructions when executed by the one or more processors, cause the one or more processors to:
assign one of a set of non-arbitrary reserved tone values to a reserved tone channel carrier based on a predetermined peak-to-average-power ratio (PAPR) threshold;
produce a second set of non-arbitrary reserved tone values by filtering the set of non-arbitrary reserved tone values; and
perform the channel estimation based on the reserved tone channel carrier.
7. A method for performing channel estimation for an Orthogonal Frequency Division Multiplexed (OFDM) signal, the method comprising:
determining a set of non-arbitrary reserved tone values;
assigning tone values from the set of non-arbitrary reserved tone values to non-pilot channel carriers based on a predetermined peak-to-average-power ratio (PAPR) threshold;
producing a second set of non-arbitrary reserved tone values by filtering the set of non-arbitrary reserved tone values; and
using the non-pilot channel carriers to perform the channel estimation.
8. The method of claim 7 , wherein the set of non-arbitrary reserved tone values comprises at least a subset of pilot tone values.
9. The method of claim 7 , wherein the channel estimation is performed in a receiver configured to receive the OFDM signal.
10. An apparatus for performing channel estimation for an Orthogonal Frequency Division Multiplexed (OFDM) signal, the apparatus comprising:
means for determining a set of non-arbitrary reserved tone values;
means for assigning tone values from the set of non-arbitrary reserved tone values to non-pilot channel carriers based on a predetermined peak-to-average-power ratio (PAPR) threshold;
means for producing a second set of non-arbitrary reserved tone values by filtering the set of non-arbitrary reserved tone values; and
means for using the non-pilot channel carriers to perform the channel estimation.
11. A non-transitory computer readable medium carrying one or more sequences of one or more instructions for execution by one or more processors to perform a method for providing channel estimation for an Orthogonal Frequency Division Multiplexed (OFDM) signal, the instructions when executed by the one or more processors, cause the one or more processors to:
determine a set of non-arbitrary reserved tone values;
assign tone values from the set of non-arbitrary reserved tone values to non-pilot channel carriers based on a predetermined peak-to-average-power ratio (PAPR) threshold;
produce a second set of non-arbitrary reserved tone values by filtering the set of non-arbitrary reserved tone values; and
use the non-pilot channel carriers to perform the channel estimation.
12. The non-transitory computer readable medium of claim 11 , wherein the set of non-arbitrary reserved tone values comprises at least a subset of pilot tone values.
13. The method of claim 1 , further comprising dynamically determining the set of non-arbitrary reserved tone values during an initialization.
14. The method of claim 1 , further comprising assigning one of the second set of non-arbitrary reserved tone values to a second reserved tone channel carrier based on the predetermined PAPR threshold.