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Method and apparatus for adapting a time division duplex timing device for propagation delay

  • US 5,959,982 A
  • Filed: 08/29/1997
  • Issued: 09/28/1999
  • Est. Priority Date: 08/29/1997
  • Status: Expired due to Term
First Claim
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1. An adjustable Time Division Duplex (TDD) timer for a communication system, comprising:

  • a timer engine integrated circuit (IC) providing fixed time slices each having fixed duration transmit and receive portions and a fixed duration central guard band at a fixed driving clock frequency;

    a clock input to the timer engine; and

    a clock halt signal to the clock input, adapted to halt the clock input when the clock halt signal is enabled;

    wherein an adjustable central guard band is provided by enabling the clock halt signal at a predetermined time point within the fixed duration central guard band in each time slice for a predetermined duration, and wherein the clock halt signal is also used to provide guard bands at each end of each time slice to provide thereby in each time slice three guard bands, the guard bands at the beginning and end of each time slice being equal in time duration.

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