High-data-rate supplemental channel for CDMA telecommunications system

• US 6,842,477 B2
• Filed: 10/09/2002
• Issued: 01/11/2005
• Est. Priority Date: 01/15/1997
• Status: Expired due to Term

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Tiedemann, Edward G. Jr., Jou, Yu-Cheun, Odenwalder, Joseph P., Antonio, Franklin P.
• Primary Examiner(s): Bocure, Tesfaldet
• Application Number:
  US10/268,191
• Publication Number:
  US 20030108088A1
• Time in Patent Office: 825 Days
• Field of Search: 375/130, 375/140, 375/141, 375/145, 375/146, 375/377, 370/206, 370/208, 370/209, 370/342, 370/335
• US Class Current: 375/146
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 7/264 for data rate control
• CPC Class Codes: H04J 13/0003 Code application, i.e. aspects relating to how codes are applied to form multiplexed channels
• CPC Class Codes: H04J 13/0048 Walsh
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0059 Convolutional codes
• CPC Class Codes: H04L 1/0067 Rate matching H04L1/0013 and H04L1/08 take precedence
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint

Abstract

A novel and improved method for implementing a high-transmission-rate over-the-air interface is described. A transmit system provides an in-phase channel set and a quadrature-phase channel set. The in-phase channel set is used to provide a complete set of orthogonal medium rate control and traffic channels. The quadrature-phase channel set is used to provide a high-rate supplemental channel and an extended set of medium rate channels that are orthogonal to each other and the original medium rate channels. The high-rate supplemental channel is generated over a set of medium rate channels using a short channel code. The medium rate channel is generated using a set of long channel codes.

Claims

1. An apparatus, comprising:

first means for generating a complex data source having a multichannel term and a high-rate term;

second means for generating the complex spreading code having an in-phase term and quadrature-phase term;

third means for complex multiplying a complex data source and said complex spreading code yielding a real term and an imaginary term, wherein the complex data source comprises the multichannel term and the high rate term;

fourth means for modulating said real term with an in-phase carrier; and

fifth means for modulating said imaginary term with a quadrature-phase carrier.

2. An apparatus, comprising:

means for generating a set of medium rate in-phase channels; and

means for generating a set of high speed quadrature channels that is orthogonal to the in-phase channels; and

means for combining the in-phase channel set and the quadrature channel set to form an in-phase term and a quadrature phase term.

3. An apparatus, comprising:

means for generating a set of channels using a set of long Walsh codes;

means for generating a high-rate channel using a short Walsh code;

means for transmitting the set of channels via a first carrier; and

means for transmitting the high-rate channel via a second carrier that is orthogonal to the first carrier.

4. An apparatus, comprising:

first means for generating a set of medium rate channels; and

second means for generating a high-speed channel that is orthogonal to the set of medium rate channels, wherein said second means comprises a means for transmitting data via a set of evenly distributed long code channels.