Radio communication receiver with apparatus for altering bit rate of the receiver

• US 4,816,820 A
• Filed: 11/04/1986
• Issued: 03/28/1989
• Est. Priority Date: 10/21/1986
• Status: Expired due to Term

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Davis, Walter L.
• Primary Examiner(s): YUSKO, DONALD
• Application Number:
  US06/938,081
• Time in Patent Office: 875 Days
• Field of Search: 340/825.44, 340/825.52, 370/84, 370/72, 370/94, 370/82, 370/79
• US Class Current: 340/7.41
• CPC Class Codes: H04L 25/0262 Arrangements for detecting the data rate of an incoming signal
• CPC Class Codes: H04W 8/245 from a network towards a terminal
• CPC Class Codes: H04W 88/022 Selective call receivers

Abstract

A radio communication receiver decodes digital signals transmitted over a radio link and is capable of altering the bit rate of the receiver to match the bit rate transmitted form a remote location. The receiver includes a receiver portion 21 receiving radio signals and producing a received signal. A microporocessor 26 is used for decoding the received signal. The microprocessor (26) is responsive to a bit rate signal that is generated by a programmable divider (33). The microprocessor (26) is adpated to detect a predetermined code signal to alter the timing characteristic of the bit rate signal for generating a bit rate signal at a second rate for decoding received signals at a second bit rate designated by the predetermined code signal.

Claims

1. A selective call radio receiver for receiving digitally encoded radio signals transmitted to a plurality of radio receivers at a predetermined bit rate, comprising:

means for receiving said digitally encoded radio signals,

bit rate timing means for generating a bit rate signal at said predetermined rate,

decoder means responsive to the bit rate signal for decoding the digitally encoded signal,

control means responsive to the decoded digitally encoded signal for selectively actuating the bit rate timing means for generating a bit rate signal at different rate corresponding to a now predetermined bit rate and maintaining the new predetermined bit rate until a signal is received designating a new bit rate.

2. A method of operating a selective call radio receiver in a plural population of receivers, comprising the steps of:

receiving first digital information signals transmitted at a predetermined bit rate,

decoding at the predetermined bit rate the received information, including information designating a new predetermined bit rate for further information,

receiving further information signals transmitted at said new predetermined bit rate,

and decoding at said new predetermined bit rate the further received information and maintaining the new predetermined bit rate until information designating a new bit rate is received.

3. The method of claim 2 wherein:

the further information signals includes address information for the receiver, and

data information.

4. The method of claim 2, wherein the further information signals include a sync code.

5. The method of claim 4, wherein:

the further information includes address information for the receiver.