Method and apparatus for controlling the timing within a transceiver

• US 5,278,832 A
• Filed: 12/20/1990
• Issued: 01/11/1994
• Est. Priority Date: 12/20/1990
• Status: Expired due to Term

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Binzel, Charles P., Bussan, Christopher F., DeClerck, Daniel J.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): HOM, SHICK C
• Application Number:
  US07/632,236
• Time in Patent Office: 1,118 Days
• Field of Search: 370/95.3, 370/95.1, 370/100.1, 370/105.3, 370/108, 370/77, 370/104.1, 370/109, 375/119, 375/120, 375/107, 342/358, 342/372
• US Class Current: 370/347
• CPC Class Codes: H04B 7/2643 using time-division multiple access [TDMA] H04B7/2615, H04B7/2618 take precedence
• CPC Class Codes: H04W 56/0085 detecting a given structure in the signal

Abstract

A radio transceiver (119) including a transmitter (111), a receiver (107), and a controller (113). The controller (113) creates a fixed period reference signal (201) and a second reference signal (203) which has a variable delay in time from the fixed period reference signal (201). In addition the controller (113) creates a plurality of control signals used to control parts of the transceiver (119) and which are time dependant upon the second reference signal 203). Therefore, the adjusting of the variable delay of the second signal subsequently adjusts the plurality of control signals.

Claims

1. A method of controlling the timing of a TDMA (time division multiple access) transceiver, the transceiver including a transmitter, a receiver, and a controller, the method comprising the steps of:

creating a first reference signal having a first fixed period;

creating a second reference signal having a second fixed period and a variable delay in time from said first reference signal;

creating a plurality of control signals having fixed delays in time from said second reference signal; and

adjusting said second reference signal'"'"'s variable delay in time, such that said plurality of control signals are adjusted in time.

3. A method of controlling the timing of a Time Division Multiple Access (TDMA) transceiver in accordance with claim 1, wherein said first clock signal is the master frame reference signal and said second clock signal is the channel frame reference signal.

8. A method of controlling the timing of a TDMA transceiver in accordance with claim 1 wherein said first and said second fixed periods are equal to 4.615 milliseconds.

2. A method of controlling the timing of a Time Division Multiple Access (TDMA) transceiver, the transceiver including a transmitter, a receiver, a controller, and a microprocessor each disposed within a radiotelephone, the method comprising the steps of:

creating a first reference signal with a fixed period in the controller;

creating a second reference signal having a second fixed period and a variable delay in time from said first reference signal in the controller;

creating, in the controller, a first control signal having a first fixed delay in time from said second reference signal, such that the receiver is programmed to receive a first radio frequency for a duration of time determined by an assertion time value;

creating, in the controller, a second control signal having a fixed delay in time from said first control signal, during which the receiver acquires data;

programming the controller from the microprocessor such that said first control signal has a second fixed delay in time from said second reference signal;

programming the controller from the microprocessor such that said assertion time value has a second time value;

creating, in the controller, a third control signal having a variable delay in time from said second reference signal, such that the digital modulator is activated;

creating, in the controller, a fourth control signal having a fixed delay in time from said second reference signal, such that the transmitter is activated;

creating, in the controller, said first control signal having said second fixed delay in time from said second reference signal, such that, the receiver is programmed to receive a second radio frequency for a duration of time determined by said assertion time value;

programming the controller from the microprocessor such that said first control signal has said first fixed delay in time from said second reference signal;

programming the controller from the microprocessor such that said assertion time has a first time value;

programming the controller from the microprocessor such that said second reference signal has a second variable delay in time;

programming the controller from the microprocessor such that said third control signal has a second variable delay in time; and

creating, in the controller, said second control signal a second time having said fixed delay in time from said first control signal, said first control signal having said second fixed delay in time.

4. A TDMA (time division multiple access) radio system including at least a first and a second fixed-site transceiver, a first remote transceiver, said TDMA radio system comprising:

first means for communicating between the first fixed-site transceiver and the first remote transceiver, said first means for communicating having a first propagation delay;

second means for communicating between the second fixed-site transceiver and the first remote transceiver, said second means for communicating having a second propagation delay; and

a timing controller disposed within the first remote transceiver comprising;

first means for generating a first clock signal,

second means for generating a second clock signal synchronized to said first clock signal and having a reconfigurable fixed delay from said first clock signal related to said first propagation delay,

third means for generating a plurality of control signals having fixed delays in time from said second clock signal, and

means for reconfiguring said reconfigurable fixed delay responsive to said second propagation delay during communications between the first remote transceiver and the second fixed-site transceiver.

5. A time division multiple access (TDMA) radio system in accordance with claim 4 wherein said means for reconfiguring is further responsive to changes in said first propagation delay during communications between the first remote transceiver and the first fixed-site transceiver.

6. A method of controlling the timing of a Time Division Multiple Access (TDMA) transceiver, the transceiver including a transmitter, a receiver, and a controller, the method comprising the steps of:

creating a first clock signal having a fixed period, wherein said fixed period does not exceed nine (9) milliseconds;

creating a second clock signal synchronized to said first clock signal and having a reconfigurable fixed delay from said first clock signal;

creating a plurality of control signals having fixed delays in time from said second clock signal; and

reconfiguring said second clock signal'"'"'s fixed delay in time, such that said plurality of control signals are adjusted in time.

7. A method of controlling the timing of a Time Division Multiple Access (TDMA) transceiver in accordance with claim 6 wherein said fixed period is equal to 4.615 milliseconds.