Base station locking system and base station locking method for code division multiple access (CDMA) 2000 evolution data only (EVDO)
A locking system and base station technology, applied in the field of mobile communication, can solve the problems of reducing product application breadth, increasing functional difficulty, pilot pollution, etc., to achieve the effect of increasing signal coverage quality, improving mobile phone call quality, and reducing pilot pollution.
Active Publication Date: 2013-01-02
ALLWIN TELECOMM
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Problems solved by technology
When the pilot frequency pollution is serious to a certain extent, it will make it difficult for the mobile phone to make a call, and even cause the mobile phone to drop calls during the call. Therefore, how to solve the pilot frequency pollution is an urgent research problem.
The traditional solution is to avoid multiple power signals close to the base station from being amplified at the same time by adjusting the direction and angle of the receiving antenna. However, for the traditional solution, the effect is limited and it will increase the difficulty of the function and reduce the application of the product. Extensive
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[0057] Depend on Figure 1 to Figure 3 As shown, a base station locking system for CDMA2000 EVDO, which includes:
[0058] The receiving processing unit is used to receive and process the base station signal transmitted from the antenna to obtain a zero-IF baseband signal, and send the zero-IF baseband signal to the pilot generation unit;
[0059] The pilot generation unit is used to receive the zero-IF baseband signal, and perform cell search according to the zero-IF baseband signal, that is, to search for the signals of the repeater or other base stations near the base station, and then obtain multiple different base station signals and then lock at least One base station signal with the strongest signal generates a pilot sequence corresponding to the locked base station signal and outputs the pilot sequence;
[0060] At least one signal estimation unit is used to receive the pilot sequence, obtain the corresponding channel impulse response according to the received pilot s...
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The invention discloses a base station locking system and a base station locking method for code division multiple access (CDMA) 2000 evolution data only (EVDO). The system comprises a receiving processing unit, a pilot frequency generation unit, a signal estimation unit, a subtraction unit and a sending processing unit. The method comprises steps of obtaining zero intermediate frequency baseband signals; conducting cell search, locking the strongest base station signals and generating corresponding pilot frequency sequences; determining corresponding channel impulse response in accordance with the pilot frequency sequences and simulating corresponding pilot frequency signals; and conducting subtraction of the zero intermediate frequency baseband signals and the pilot frequency signals, obtaining difference signals and emitting the difference signals from an antenna. By the aid of the system and the method, the pilot frequency pollution is reduced, signal coverage quality of a wireless base station or a wireless repeater is improved, and the probability that a cell phone is locked to a non-target base station is ruled out. The method and the system are applied to the field of mobile communication widely.
Description
technical field [0001] The present invention relates to mobile communication technology, in particular to a base station locking system and method for CDMA2000 EVDO, and the CDMA2000 EVDO is CDMA2000 1xEVDO. Background technique [0002] Pilot pollution, which occurs when the mobile phone receives 4 or more pilots with Ec / Io strengths greater than T_add, and none of them is strong enough to be the dominant pilot. When the pilot frequency pollution is serious enough, it will make it difficult for the mobile phone to make a call, and even cause the mobile phone to drop calls during the call. Therefore, how to solve the pilot frequency pollution is an urgent research problem. The traditional solution is to avoid multiple power signals close to the base station from being amplified at the same time by adjusting the direction and angle of the receiving antenna. However, for the traditional solution, the effect is limited and it will increase the difficulty of the function and red...
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Login to View More IPC IPC(8): H04L5/00H04W24/00
Inventor 郝禄国杨建坡杨舜君何仕杰余嘉池曾文彬
Owner ALLWIN TELECOMM