Digital baseband processor used for wideband wireless communication
A digital baseband and processor technology, applied in multi-frequency code systems and other directions, can solve the problems of large chip area, unfavorable commercial development and use, and high cost of digital baseband processors, and achieve the effect of small chip area and low chip cost.
Active Publication Date: 2011-04-27
北京中科晶上科技股份有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the defects of high cost and large chip area of the existing digital baseband processors that need to integrate a large-capacity cache, which is not conducive to commercial development and use, thereby providing a low-cost digital baseband processor that does not affect processing performance
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[0021] The present invention will be described below in conjunction with the accompanying drawings and specific embodiments.
[0022] To facilitate understanding, in one embodiment of the present invention, a user terminal adopting the TD-LTE standard in 3GPP LTE is taken as an example to illustrate the structure and working process of the digital baseband processor in the user terminal. However, those skilled in the art should understand that the digital baseband processor of the present invention can also be used in user terminals adopting other standards.
[0023] Since in this embodiment, the digital baseband processor is located in the user terminal, the uplink mentioned below refers to the communication from the user terminal to the base station, and the downlink refers to the communication from the base station to the user terminal. The digital baseband processor includes an uplink transmitter and a downlink receiver.
[0024] According to the TD-LTE standard, the proc...
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The invention provides a digital baseband processor, which comprises an uplink transmitter, a downlink receiver, a centralized storage and an access concentrator, wherein the uplink transmitter comprises an uplink processing first part comprising channel coding, quadrature amplitude modulation (QAM) and inverse discrete Fourier transform (IDFT), and an uplink processing second part used for performing CP insertion, shaping filter and timing transmission operation; the downlink receiver comprises a downlink processing first part used for frame synchronization processing, a downlink processing second part used for performing CP removal, orthogonal frequency division multiplexing (OFDM) demodulation, synchronization, multiple input multiple output (MIMO) decoding, QAM soft demodulation and rate de-matching operation on data, and a downlink processing third part used for performing channel decoding and check operation; and the access concentrator comprises a first access port connected with the downlink processing first part and a downlink processing second part, a third access port connected with the downlink processing third part, and a second access port connected with the uplink processing first part and the uplink processing second part.
Description
technical field [0001] The invention relates to the field of wireless communication, in particular to a digital baseband processor for broadband wireless communication. Background technique [0002] With people's increasing demand for high-speed wireless multimedia data services, the industry has been devoting itself to the research and development of high-speed wireless communication systems. The peak transmission rate of existing 2G (GSM) mobile phone data is 9.6kbps, and the peak transmission rate of 3G (CDMA2000 / WCDMA / TD-SCDMA) mobile phone data is only 2Mbps, which is difficult to meet the actual needs of users. In the absence of large-scale commercial use, experts in the field of mobile communications at home and abroad have already started research and development of 4G (or B3G) systems. The current advanced broadband wireless communication protocols are mainly 3GPP's LTE and LTE+, and IEEE 802.16e, 802.16m and other protocols. In the above-mentioned communication p...
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Inventor 王剑冯雪林韩娟崔瑱王秋菊唐杉石晶林
Owner 北京中科晶上科技股份有限公司