Wireless data transmission method capable of regulating parameters simultaneously according to information source and channel variations
A technology of wireless data transmission and channel change, applied in the direction of digital transmission system, link quality-based transmission modification, transmission system, etc. effect achieved
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[0038] based on the following figure 1 , specifically explain the preferred embodiment of the present invention.
[0039] Such as figure 1 As shown, in this embodiment, direct sequence code division multiple access technology is adopted, and time slots and spreading codes are mapped into basic logical channels. The coding efficiency, constellation size, and transmission power of the coded modulator are variable, while the coded modulator structure and decoding algorithm remain unchanged in all rate domains.
[0040] For each user, different media services are multiplexed into an integrated data stream, which is transmitted in parallel by one or more spreading codes after channel coding, modulation and power control. Taking the currently transmitted media service type as a parameter, allocate a dedicated service channel (spreading code) according to step 2, so as to meet the data rate and maximum delay requirements. At the same time, according to the BER requirements in the ...
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