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Pseudo-noise state generating device and method

A pseudo-noise and pseudo-noise code technology, applied in the field of devices for generating pseudo-noise code states

Inactive Publication Date: 2008-06-25
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] However, in such conventional methods, since the time-shifted pseudo-noise state is generated by controlling the clock controller 20 according to the offset information, it takes considerable time to obtain the required time-shifted PN state

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  • Pseudo-noise state generating device and method

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Embodiment Construction

[0032] Introduce preferred embodiment of the present invention below in conjunction with accompanying drawing. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

[0033] figure 2 is a block diagram of an apparatus for generating pseudo-noise (PN) states according to a preferred embodiment of the present invention. image 3 and Figure 4It is the circuit diagram of 5-level PN code generator, extended PN code generator and pseudo-noise mask converter.

[0034] refer to figure 2 , the device for generating a PN state includes a pseudo-noise code generator 100 , an extended pseudo-noise code generator 200 , and a pseudo-noise mask converter 300 . Here, the pseudo noise code generator 100 preferably has a linear feedback shift register (LFSR) structure.

[0035] Briefly describing the present invention, first, a pseudo noise code generator 100 generates state values ​​th...

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Abstract

The present invention relates to an apparatus and a method for generating wanted previous PN states using a clock signal once. More specifically, the apparatus includes a PN code generator for generating current PN states composed of current PN state values that are outputted from each end of N shift registers; an expanded PN code generator for generating N-1 previous state values of the shift register using the current state values; and a means for outputting time-shifted PN states by operating the current state values and the N-1 previous state values together with a PN mask value, thereby shortening a great amount of time required to generate the previous PN states.

Description

technical field [0001] The present invention generally relates to a device for generating a pseudo-noise (PN) code state in a mobile communication system, and particularly relates to a device and method for generating a time-shifted pseudo-noise state. [0002] Therefore, the present invention can generate the current pseudo-noise state and the previous pseudo-noise state, and can be applied to a direct sequence spread spectrum (DS-SS) system or a frequency hopping spread spectrum (FH-SS) system. Background technique [0003] Although the technology to commercialize Code Division Multiple Access (CDMA) digital mobile phone systems has only recently been developed, CDMA was theoretically established and used in military communications as early as the 1950's. Especially, in military communication, anti-eavesdropping is very important. Spread spectrum, the basis of CDMA technology, has been a great help to the military in avoiding any form of eavesdropping, more than any other...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J13/02H04Q7/20G06F7/58H03K3/84H04J13/00H04J13/10
CPCH04J13/0022H04J13/10G06F7/584H03K3/84
Inventor 赵庆国
Owner LG ELECTRONICS INC