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Narrow Bandwidth Channels in TGj

Narrow Bandwidth Channels in TGj. Christopher Hansen Broadcom Corporation. Current Approach. Clock dividing scheme proposed in 03/114r1 Take existing .11a 20 MHz clock and divide by 2 or 4 Everything else remains the same. Problems Caused. Slows down MAC timing

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Narrow Bandwidth Channels in TGj

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  1. Narrow Bandwidth Channels in TGj Christopher Hansen Broadcom Corporation Christopher Hansen, Broadcom

  2. Current Approach • Clock dividing scheme proposed in 03/114r1 • Take existing .11a 20 MHz clock and divide by 2 or 4 • Everything else remains the same Christopher Hansen, Broadcom

  3. Problems Caused • Slows down MAC timing • Additional throughput reduction in excess of PHY loss • Tightens frequency tolerance beyond a reasonable specification • .11a 20ppm / 4 = 5 ppm • Narrow bandwidth devices need more expensive components • A 5 ppm tolerance is probably not feasible; it is definitely not desirable Christopher Hansen, Broadcom

  4. Solution • TGj needs to examine better solutions that will meet our PAR • We need a call for proposals specifically for PHY modifications for the narrow band channels Christopher Hansen, Broadcom

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