Spread spectrum processing method and spread spectrum processing device
A processing method and technology of a processing device, applied in electrical components, transmission systems, multiplexing code generation, etc., can solve the problem of difficult guarantees, low cross-correlation of binary pseudo-random sequences, and overload levels that affect system load capacity or support. and other problems to achieve the effect of improving interference cancellation, high system overload level, and low cross-correlation
Inactive Publication Date: 2016-04-20
ZTE CORP
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[0005] However, when the system is overloaded, the low cross-correlation between the binary pseudo-random sequences adopted by different transmitters is not easy to guarantee, especially the short-length binary pseudo-random sequences, which will affect the non-regularity of CDMA. The interference elimination effect of handover access and the performance of multi-user reception detection affect the number of terminal accesses in the system, thereby affecting the load capacity of the system or the overload level supported, and reducing the communication experience of users' non-orthogonal overload access
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[0076] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.
[0077] figure 1 It is a flow chart of the spread spectrum processing method of the present invention, as figure 1 shown, including:
[0078] Step 100: Generate complex spreading sequences according to two or more binary pseudo-random sequences.
[0079] In this step, the method also includes generating two or more binary pseudo-random sequences before, specifically including:
[0080] Two or more binary pseudo-random sequences can be generated separately by independent binary pseudo-random sequence generators; or,
[0081] It is also possible to generate a binary pseudo-r...
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The invention discloses a spread spectrum processing method and a spread spectrum processing device. The spread spectrum processing method is characterized in that a plurality of spread spectrum sequences can be generated according to two or more than two binary pseudorandom sequences; and spread spectrum processing of data symbols to be transmitted can be carried out by adopting the plurality of spread spectrum sequences. According to the spread spectrum processing method, the spread spectrum processing of the data symbols to be transmitted of various transmitting devices can be carried out by adopting the plurality of spread spectrum sequences generated according to two or more than two binary pseudorandom sequences, and then the low cross correlation between the plurality of different spread spectrum sequences adopted by different transmitting devices can be guaranteed, and the by combining with the interference eliminating signal detectors adopted by the receiving devices, the signals transmitted by various transmitting devices can be discriminated effectively, and therefore the interference eliminating effect of the receiving devices and the non-orthogonal access multi-user receiving detecting performance can be improved, the higher overload level of the system can be supported, and the user non-orthogonal overload access and communication experience can be improved.
Description
technical field [0001] The invention relates to code division multiple access (CDMA, CodeDivisionMultipleAccess) technology, in particular to a spread spectrum processing method and device. Background technique [0002] Code Division Multiple Access (CDMA, Code Division Multiple Access) is one of the main schemes of multi-user multiple access technology. Current code division multiple access systems, such as direct sequence spread spectrum code division multiple access (DS-CDMA, DirectSequence-CodeDivisionMultipleAccess), multi-carrier code division multiple access (MC-CDMA, Multi-CarrierCodeDivisionMultipleAccess), etc., In the uplink, different transmitters or terminals use different binary pseudo-random (PN, Pseudo-Noise) real number sequences as spreading sequences to perform spreading processing on the data symbols sent respectively, and then spread the processed data The symbol sequence is modulated by the carrier to form a transmitted signal and sent to the receiver....
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IPC IPC(8): H04B1/7097H04J13/10
CPCH04B1/7097
Inventor 李卫敏袁志锋刘向宇
Owner ZTE CORP