Carrier interferometry coding with applications to cellular and local area networks

• US 7,787,514 B2
• Filed: 10/30/2003
• Issued: 08/31/2010
• Est. Priority Date: 02/12/1998
• Status: Expired due to Fees

• Current Assignee: Arnold Alagar, Department 13, Inc. (Department 13 International Ltd.), Steve Shattil
• Original Assignee: Lot 41 Acquisition Foundation LLC (Intellectual Ventures LLC)
• Inventors: Shattil, Steve
• Primary Examiner(s): KIM, KEVIN
• Application Number:
  US10/697,534
• Publication Number:
  US 20040100897A1
• Time in Patent Office: 2,497 Days
• Field of Search: 375/130, 375/140, 375/141, 375/145, 375/146, 375/147, 375/148, 375/260
• US Class Current: 375/130
• CPC Class Codes: H04L 1/04 using frequency diversity
• CPC Class Codes: H04L 2025/03414 Multicarrier
• CPC Class Codes: H04L 2025/03426 transmission using multiple-input and multiple-output channels
• CPC Class Codes: H04L 25/0204 of multiple channels
• CPC Class Codes: H04L 25/0228 with direct estimation from sounding signals
• CPC Class Codes: H04L 25/03159 operating in the frequency domain H04L25/03165, H04L25/03178 take precedence
• CPC Class Codes: H04L 25/03343 Arrangements at the transmitter end
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/26025 Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking allocating sub-channels of the transmission path H04L5/003
• CPC Class Codes: H04L 27/26035 Maintenance of orthogonality, e.g. for signals exchanged between cells or users, or by using covering codes or sequences using different training sequence per antenna H04B7/0684; code allocation H04J13/16
• CPC Class Codes: H04L 27/262 Reduction thereof by selection of pilot symbols
• CPC Class Codes: H04L 27/2621 Reduction thereof using phase offsets between subcarriers
• CPC Class Codes: H04L 27/2631 with polyphase implementation
• CPC Class Codes: H04L 27/26532 Demodulators using other transforms, e.g. discrete cosine transforms, Orthogonal Time Frequency and Space [OTFS] or hermetic transforms
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0066 Requirements on out-of-channel emissions

Abstract

An adaptation to Carrier Interferometry synthesis and analysis provides for frequency-varying subcarriers. Coding and decoding functionality can be extended to orthogonal chirped and frequency-hopped waveforms. Poly-amplitude codes permit successive interference cancellation in spatial and frequency-domain processing. Dynamic re-sectorization and bandwidth exchange are facilitated by subcarrier allocation.

Claims

1. A carrier interferometry (CI) transmitter, comprising:

a CI coder adapted to encode at least one data sequence onto a CI code to produce at least one data-bearing code vector and to adjust subcarrier weights, and

a modulator adapted to modulate the at least one data-bearing code vector onto a plurality of subcarriers,

wherein at least one of the modulator or the CI coder is adapted to scramble CI codes generated by the CI coder.

2. The CI transmitter recited in claim 1 wherein the modulator includes an invertible transform module.

3. The CI transmitter recited in claim 2 wherein the invertible transform module is adapted to perform at least one of a Fourier transform, a chirp Z transform, or a sliding transform.

4. The CI transmitter recited in claim 1, wherein the CI coder is adapted to provide for channel coding.

5. The CI transmitter recited in claim 1, wherein at least one of the modulator and the CI coder is adapted to dynamically allocate subcarriers for at least one communication link.

6. A carrier interferometry (CI) transmitter, comprising:

a CI coder adapted to encode at least one data sequence onto a CI code to produce at least one data-bearing code vector and to adjust subcarrier weights, and

a modulator adapted to modulate the at least one data-bearing code vector onto a plurality of subcarriers,

wherein at least one of the modulator or the CI coder is adapted to provide intentional frequency variations to the subcarriers.

7. A carrier interferometry (CI) transmitter, comprising:

a CI coder adapted to encode at least one data sequence onto a CI code to produce at least one data-bearing code vector and to adjust subcarrier weights, and

a modulator adapted to modulate the at least one data-bearing code vector onto a plurality of subcarriers,

wherein the CI coder is adapted to perform at least one CI coding algorithm configured to non-uniformly spread the at least one data sequence across the plurality of subcarriers.

8. A Carrier Interferometry (CI) receiver, comprising:

a demodulator adapted to demodulate at least one data-bearing CI code vector modulated on a plurality of subcarriers and having at least one data sequence non-uniformly spread across the plurality of subcarriers, and

a CI decoder adapted to decode at least one received data sequence impressed onto the CI code vector and to adjust subcarrier weights.

9. A carrier interferometry (CI) receiver, comprising:

a demodulator adapted to demodulate at least one data-bearing CI code vector modulated on a plurality of subcarriers, and

a CI decoder adapted to decode at least one received data sequence impressed onto the CI code vector and to adjust subcarrier weights,

wherein at least one of the demodulator or the CI decoder is adapted to descramble CI codes.

10. The CI receiver recited in claim 9, wherein the demodulator includes an invertible transform module.

11. The CI receiver recited in claim 10, wherein the invertible transform module is adapted to perform at least one of a Fourier transform, a chirp Z transform, or a sliding transform.

12. The CI receiver recited in claim 9, wherein the CI decoder is adapted to provide for channel decoding.

13. The CI receiver recited in claim 9, wherein at least one of the CI decoder or the demodulator are adapted to perform successive interference cancellation.

14. A carrier interferometry (CI) receiver, comprising:

a demodulator adapted to demodulate at least one data-bearing CI code vector modulated on a plurality of subcarriers, and

a CI decoder adapted to decode at least one received data sequence impressed onto the CI code vector and to adjust subcarrier weights,

wherein at least one of the demodulator or the CI decoder is adapted to compensate at least one signal based on the data-bearing CI code vector on the plurality of subcarriers for subcarrier frequency variations intentionally imparted to one or more of the subcarriers by a transmitter.