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Equipment for using complex four-phase phase-shift keying processing data of communication system and method

A four-phase phase-shift keying and data processing technology, which is applied in phase-modulated carrier systems, radio/inductive link selection arrangements, selection devices, etc., can solve the problem that four-phase phase-shift keying is not enough to effectively process a large amount of data, etc. question

Inactive Publication Date: 2003-02-05
PANTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Quadrature phase shift keying is not enough to handle large amounts of data efficiently
The data processing speed depends on the modulation / demodulation method of the modem in the mobile station, and the conventional modulation and demodulation method cannot meet the above-mentioned needs of the next-generation mobile communication

Method used

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  • Equipment for using complex four-phase phase-shift keying processing data of communication system and method
  • Equipment for using complex four-phase phase-shift keying processing data of communication system and method
  • Equipment for using complex four-phase phase-shift keying processing data of communication system and method

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Embodiment Construction

[0018] Other objects and aspects of the present invention will become apparent from the following description of the embodiments with reference to the accompanying drawings.

[0019] figure 1 The complex quadrature phase shift keying and spread spectrum method implemented in the preferred embodiment of the present invention is illustrated. There may be more than four channels, but for convenience of description, in this specification, four channels are described as an example.

[0020] see figure 1 , multiply a Walsh code by the dedicated control channel (R-DCCH), high-speed data transmission channel (R-SCH) and voice channel (R-FCH), and multiply by a relative gain. Thereafter, modulation of complex quadrature phase-shift keying (CQPSK) is performed by using in-phase pseudorandom noise (I-PN) codes, quadrature pseudorandom noise (Q-PN) codes, and long pseudorandom noise (long PN) codes . Finally, the modulated signal is generated by using a pulse-shaping filter (FIR) and ...

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Abstract

Disclosed is an apparatus and method for processing data using the complex quadrature phase shift keying (CQPSK). The present invention includes plurality of multiplying units for multiplying a long pseudo noise (PN) code with an in-phase pseudo noise and quadrature pseudo noise, and a results of multiplying with a pilot channel, a dedicated control channel, a voice channel, a high-speed data transmission channel, a result multiplied with channels with gain, filtering units for eliminating noise, subtracting and adding units for calculating final result, and in-phase / quadrature channel outputting unit for outputting I-channel / Q-channel. The present invention can improve data processing speed of a radio channel, increase capacity of data processing in radio communication and also can be applicable to various kinds of radio communication devices transceiving voice, media contents and high-speed data at a same time.

Description

technical field [0001] The present invention relates to an apparatus and method for processing data according to complex quadrature phase shift keying for increasing the data processing speed of a radio channel and providing high quality data. In other words, the present invention improves the processing speed of modulated / demodulated data to provide high-quality data services by implementing a modulation / demodulation method of a modem (MODEM) in a mobile station as an Application Specific Integrated Circuit (ASIC). Background technique [0002] A modem (MODEM) is a device that converts digital signals generated in a computer into analog signals for transmission over the telephone network and inversely converts analog signals received through the telephone network into digital signals. [0003] Typical telephone lines and leased lines are only used for voice data, so there is a lot of attenuation in the transmission of digital signals. In order to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/20H04L27/18
CPCH04L27/18
Inventor 徐普鸿
Owner PANTECH CO LTD