Multicarrier sub-layer for direct sequence channel and multiple-access coding

• US 7,430,257 B1
• Filed: 04/24/2002
• Issued: 09/30/2008
• Est. Priority Date: 02/12/1998
• Status: Expired due to Term

• Current Assignee: Arnold Alagar, Genghiscomm Holdings, LLC
• Original Assignee: Lot 41 Acquisition Foundation LLC (Intellectual Ventures LLC)
• Inventors: Shattil, Steve
• Primary Examiner(s): Corrielus; Jean B
• Application Number:
  US10/131,163
• Time in Patent Office: 2,351 Days
• Field of Search: 375/146, 375/206, 375/208, 375/279, 375/330, 375346-347, 375349-350, 375/340, 375/267, 375/130, 375147-148, 342/367
• US Class Current: 375/347
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 1/7095 Sliding correlator type
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04J 13/10 Code generation
• CPC Class Codes: H04J 13/18 Allocation of orthogonal codes
• CPC Class Codes: H04J 2013/0037 Multilevel codes
• CPC Class Codes: H04L 1/0056 Systems characterized by the type of code used H04L1/08 takes precedence
• CPC Class Codes: H04L 1/04 using frequency diversity
• CPC Class Codes: H04L 25/0202 Channel estimation
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 27/2637 with direct modulation of individual subcarriers
• CPC Class Codes: H04L 5/0021 in which codes are applied as a frequency-domain sequences, e.g. MC-CDMA

Abstract

Carrier Interferometry (CI) provides wideband transmission protocols with frequency-band selectivity to improve interference rejection, reduce multipath fading, and enable operation across non-continuous frequency bands. Direct-sequence protocols, such as DS-CDMA, are provided with CI to greatly improve performance and reduce transceiver complexity. CI introduces families of orthogonal polyphase codes that can be used for channel coding, spreading, and/or multiple access. Unlike conventional DS-CDMA, CI coding is not necessary for energy spreading because a set of CI carriers has an inherently wide aggregate bandwidth. Instead, CI codes are used for channelization, energy smoothing in the frequency domain, and interference suppression. CI-based ultra-wideband protocols are implemented via frequency-domain processing to reduce synchronization problems, transceiver complexity, and poor multipath performance of conventional ultra-wideband systems. CI allows wideband protocols to be implemented with space-frequency processing and other array-processing techniques to provide either or both diversity combining and sub-space processing. CI also enables spatial processing without antenna arrays. Even the bandwidth efficiency of multicarrier protocols is greatly enhanced with CI. CI-based wavelets avoid time and frequency resolution trade-offs associated with conventional wavelet processing. CI-based Fourier transforms eliminate all multiplications, which greatly simplifies multi-frequency processing. The quantum-wave principles of CI improve all types of baseband and radio processing.

Claims

1. A receiver system including:

a multiple-element receiver to generate a plurality of interfering received signals relative to at least a first set of diversity-parameter values,

at least one filter band adapted to separate the plurality of interfering received signals into a plurality of carrier interferometry (CI) components relative to at least a second set of diversity-parameter values, and

a combiner adapted to combine the plurality of CI components with the at least first set of diversity-parameter values to produce a plurality of combined CI components, the combiner further adapted to combine the plurality of combined CI components with the at least second set of diversity-parameter values to produce at least one estimate information signal.

2. A communication apparatus comprising:

a carrier interferometry (CI)-based radio receiver configured according to a computer-based system including;

at least one hardware component including at least one computer processing unit and at least one memory device adapted to support software module; and

at least one software module, to be supported by said at least one memory device including at least one software application program adapted to perform carrier selection and carrier weighting such that a superposition of any of a plurality of weighted carriers is provided with at least one of a set of predetermined signal parameters, the set including formatting, source decoding, decryption, sub-channel decoding, channel decoding, demultiplexing, demodulation, spread-spectrum decoding, and multiple-access decoding.