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Random phase multiple access communication interface system and method

A technology of multiple access communication and interface, applied in the field of communication

Active Publication Date: 2011-06-01
NDJR网格第二合伙有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Existing modulation and collision prevention techniques, including those described above and other known techniques, have inherent disadvantages that limit the capabilities and functionality of the communication systems in which they are used

Method used

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  • Random phase multiple access communication interface system and method
  • Random phase multiple access communication interface system and method
  • Random phase multiple access communication interface system and method

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Embodiment Construction

[0034] Exemplary embodiments are described below with reference to the accompanying drawings. It is to be understood that the following description is intended to describe exemplary embodiments and not to limit the invention as defined in the appended claims.

[0035] figure 1An uplink transmitter 10 is exemplified, which includes components such as convolutional encoders, interleaving modules, modulators, pseudo-noise spreaders (spreaders), filters, tag banks, automatic frequency control (AFC) rotators, and other such The structure of the class structure. These structures perform the operations depicted in blocks 12 , 14 , 16 , 18 , 20 , and 22 . The transmit path of the uplink transmitter 10 is a coded spread spectrum waveform. In an exemplary embodiment, the uplink transmitter 10 may be included in a tag that communicates with an access point and other tags using a demodulated communication channel. Additional, fewer, or different operations may be performed by uplink t...

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Abstract

A method for communicating through a multiple access communication interface includes receiving a first signal from a first tag, wherein the first signal is spread using a predetermined pseudo-noise (PN) code, and further wherein the first signal includes first payload data. A second signal is received from a second tag. The second signal is spread using the predetermined PN code, and the second signal includes second payload data. The first payload data from the first signal is identified at least in part with a PN array despreader. The second payload data from the second signal is also identified at least in part with the PN array despreader.

Description

technical field [0001] Embodiments of the present application relate to the field of communications. More specifically, the exemplary embodiments relate to random phase multiple access communication interface systems and methods. Background technique [0002] Many modulation techniques have been developed to facilitate communication in networks where multiple users exist. Such techniques include Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), and Frequency Division Multiple Access (FDMA). CDMA is a spread spectrum technique that uses a sequence of pseudorandom numbers to modulate incoming data, multiple transmitters transmitting on the same signal, and orthogonal codes (Walsh codes) to correlate different communication channels. TDMA uses slots to coordinate multiple uplink transmitters transmitting in the same sub-slot. Users transmit in rapid succession, one after the other, each using his / her own time slot, allowing multiple stations to shar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7075H04B1/7103H04J13/00H03J7/02H04B1/69H04B1/707
CPCH04J3/0685H04L1/18H04B1/7075H04J13/16H04L1/0061H04J13/0074H04B2201/709709H03J7/02H04L7/0004H04B1/707H04B1/70752H04B1/7103H04J13/0022H04B1/7073H04W88/08
Inventor T.J.迈尔斯
Owner NDJR网格第二合伙有限责任公司
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