Methods and systems for multiplexing of multiple users for enhanced capacity radiocommunications

• US 6,535,497 B1
• Filed: 05/15/1998
• Issued: 03/18/2003
• Est. Priority Date: 05/11/1998
• Status: Expired due to Term

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Raith, Alex Krister
• Primary Examiner(s): HSU, ALPUS
• Application Number:
  US09/079,205
• Time in Patent Office: 1,768 Days
• Field of Search: 370/277, 370/280, 370/294, 370/329, 370/336, 370/337, 370/345, 370/347, 370/442, 370/458, 370/462, 370/465, 370/498, 370/521, 370/535, 370/540, 375/240, 375/241, 379/93.08, 455/38.1, 455/422, 455/450, 455/451, 455/452, 455/509, 704/200, 704/211, 704/229, 704/500
• US Class Current: 370/336
• CPC Class Codes: H04B 7/2628 using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] H04B7/2618 takes precedence
• CPC Class Codes: H04B 7/264 for data rate control
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/007 Unequal error protection for format H04L1/0078; for codes per se H03M13/35
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/208 involving signal re-encoding
• CPC Class Codes: H04L 27/18 Phase-modulated carrier systems, i.e. using phase-shift keying H04L27/32 takes precedence
• CPC Class Codes: H04L 5/12 the signals being represented by different phase modulations of a single carrier

Abstract

A radiocommunication system supports multi-user multiplexing. Half rate data communications with interleaving of data between two sources are described.

Claims

1. A method for communicating information in a radiocommunication system comprising the steps of:

multiplexing information to a first user and information to a second user into a first full rate time slot;

transmitting said multiplexed information;

decoding the information to said first user from said multiplexed information;

improving a channel estimate based on said decoded information to said first user;

re-encoding said multiplexed information; and

decoding the information to said second user based on said improved channel estimate.

2. A method for communicating in a radiocommunication system, comprising the steps of:

multiplexing information into a full rate time slot, wherein said multiplexed information comprises as least first user information to a first user and second user information to a second user;

transmitting said multiplexed information;

decoding said first user information from said multiplexed information;

improving a channel estimate based on said decoded first user information;

re-encoding said multiplexed first user information; and

decoding said second user information based on said improved channel estimate.