1. Technical complexity related to meeting the RF mask
January 2006
doc.: IEEE /0006r0
January 2009
Technical complexity related to meeting the RF mask
Author:
Abstract
This contribution summarizes graphically the technical trade-offs required to meet the RF mask specified by the FCC R&O
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Gerald Chouinard, CRC
Gerald Chouinard, CRC

2. January 2009
RF mask as specified in the FCC R&O (i.e., relative the in-channel PSD in 100 kHz)
Gerald Chouinard, CRC

3. January 2009
RF mask as specified in the FCC R&O (i.e., relative the in-channel PSD in 100 kHz)
Gerald Chouinard, CRC

4. January 2009
RF mask as specified in the FCC R&O (i.e., relative the in-channel PSD in 100 kHz)
Gerald Chouinard, CRC

5. RF mask to be specified relative to the total power in the TV channel
January 2009
RF mask to be specified relative to the total power in the TV channel
Gerald Chouinard, CRC

6. RF output signal from the 802.22 WRAN 2k FFT
January 2009
RF output signal from the WRAN 2k FFT
Gerald Chouinard, CRC

7. Eighth Order Butterworth LPF
January 2009
Eighth Order Butterworth LPF
3 MHz
Oversampling by 8x
Gerald Chouinard, CRC

8. 8-tap FIR filter (40 dB rejection at 9 MHz)
January 2009
8-tap FIR filter (40 dB rejection at 9 MHz)
Gerald Chouinard, CRC

9. January 2009
PSD of PA Input Signal
Gerald Chouinard, CRC

10. January 2006
doc.: IEEE /0006r0
January 2009
Non-Linear PA Model
The nonlinearity of the power amplifier (PA) distorts the OFDM spectrum
In this document the nonlinear PA model is used
This model was used in the evaluation of n proposals [3] and was originally used in modeling b [4].
This same form of non-linearity is specified in the channel models document [2]
Gerald Chouinard, CRC
Gerald Chouinard, CRC

11. Non-Linear PA Model Asat January 2009 January 2006
doc.: IEEE /0006r0
January 2009
Non-Linear PA Model
Asat
Gerald Chouinard, CRC
Gerald Chouinard, CRC

12. PSD of PA Input and PA Output for three values of PA Back-off
January 2009
PSD of PA Input and PA Output for three values of PA Back-off
Gerald Chouinard, CRC

13. Rapp-6 model versus perfect clipper at RF
January 2009
Rapp-6 model versus perfect clipper at RF
Gerald Chouinard, CRC

14. RF output signal from the 802.22 WRAN 2k FFT
January 2009
RF output signal from the WRAN 2k FFT
Gerald Chouinard, CRC

15. 256-tap FIR filter with 34 dB rejection at 3 MHz
January 2009
256-tap FIR filter with 34 dB rejection at 3 MHz
Gerald Chouinard, CRC

16. RF output signal for 256 tap FIR filter
January 2009
RF output signal for 256 tap FIR filter
Gerald Chouinard, CRC

17. January 2009
RF output signal for 256 tap FIR filter and 8.6 dB back-off to meet the 68.5 dB rejection at 9 MHz for the second adjacent channel (Part a level for 4 W EIRP)
Gerald Chouinard, CRC

18. January 2009
RF output signal for 256 tap FIR filter and 9.2 dB back-off to meet the 55 dB rejection at 3 MHz for the first adjacent channel
Gerald Chouinard, CRC

19. January 2009
Proposed RF mask based on the RF mask contained in the FCC R&O (i.e., 55 dBr)
Gerald Chouinard, CRC

20. January 2006
doc.: IEEE /0006r0
January 2009
References
IEEE P802.22™/ DRAFTv1.0 Draft Standard for Wireless Regional Area Networks Part 22: Cognitive Wireless RAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: Policies and procedures for operation in the TV Bands, April 2008
Mark Webster, Suggested PA Model for HRb, IEEE /294r0, September 2000
FCC R&O
Gerald Chouinard, CRC
Gerald Chouinard, CRC