SPREAD SPECTRUM TRANSCEIVER

• US 20100215078A1
• Filed: 04/06/2010
• Published: 08/26/2010
• Est. Priority Date: 09/27/1991
• Status: Abandoned Application

• Current Assignee: CommWorks Solutions, LLC (IP Investments Group LLC)
• Original Assignee: CommWorks Solutions, LLC (IP Investments Group LLC)
• Inventors: Rice, Bart F.
• Application Number:
  US12/755,012
• Publication Number:
  US 20100215078A1
• Time in Patent Office: Days
• US Class Current: 375/141
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 1/7075 with code phase acquisition
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04J 13/0074 Code shifting or hopping
• CPC Class Codes: H04J 13/0077 Multicode, e.g. multiple codes assigned to one user
• CPC Class Codes: H04J 13/10 Code generation
• CPC Class Codes: H04J 13/102 Combining codes
• CPC Class Codes: H04J 13/16 Code allocation

Abstract

An assembly of simultaneously transmitted electrically generated signals, which contains a subset of binary spreading-code sequences that are members of a larger set of binary spreading-code sequences available to a particular node of a multi-node communication network. All sequences in the set of spreading-code sequences available to the particular node of the network can be generated by the same configuration of two linear-feedback binary shift registers, where feedback taps of the two linear-feedback binary shift registers correspond to primative polynomials of the same degree over GF(2), the field of two elements.

Claims

1. An assembly of simultaneously transmitted electromagnetic signals, said signals being related to each other in said assembly so as to communicate stored information to a receiver, said signals being generated by modulating selected subsets of a set of shift-register-stored binary spreading-code sequences onto a sinusoidal carrier, at least one subset of said set of binary spreading-code sequences containing more than one of said binary spreading-code sequences, each subset of said set of binary spreading-code sequences embodying a corresponding portion of said information.

2. An assembly of simultaneously transmitted electromagnetic signals, said signals being related to each other in said assembly so as to communicate stored information within a transmitting node to a receiving node of a communication network, said assembly of signals being produced by a process of:

a) assigning blocks of bits embodying said stored information to corresponding subsets of a set of shift-register-stored binary spreading-code sequences, at least one of said subsets of said set of binary spreading-code sequences containing more than one of said binary spreading-code sequences; and

b) simultaneously transmitting selected subsets of said set of stored binary spreading-code sequences from said transmitting node to said receiving node.

3. An assembly of electromagnetic signals, said signals being related to each other in said assembly so as to communicate stored information within a transmitting node to a receiving node of a communication network, said assembly of signals being produced by a process of:

a) generating a set of binary spreading-code sequences by combining contents stored within specified stages of a first binary shift register with contents stored within specified stages of a second binary shift register, said set of binary spreading-code sequences containing more than one binary spreading-code sequence;

b) assigning blocks of bits embodying said stored information to corresponding subsets of said set of binary spreading-code sequences, each of said subsets of said set of binary spreading-code sequences containing at least one of said binary spreading-code sequences; and

c) transmitting selected subsets of said set of binary spreading-code sequences from said transmitting node to said receiving node.