Wimax wideband wireless communication radio frequency system
A technology of broadband wireless communication and radio frequency system, which is applied in the field of Wimax broadband wireless communication radio frequency system to achieve rapid positioning, good consistency and light weight
Inactive Publication Date: 2011-05-04
ANHUI SUN CREATE ELECTRONICS
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This standard integrates and revises the previous standards, but still belongs to the fixed broadband wireless access specification
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[0042] See attached picture.
[0043] This device adopts the superheterodyne time division duplexing method to complete the design. Before the global chip manufacturers launched the 5.725GHz-5.850GHz frequency band and the radio frequency chip set that meets the Wimax standard, the IF chip SE7051L10 produced by SIGE and Texas instruments were successfully selected. The RF chip TRF2436 is used to complete the design. The IF frequency is fixed at 380MHz, and the RF frequency is optional within the 5.725GHz-5.850GHz frequency band.
[0044] In the present invention, when it is a transmission channel, the Tx-I and Tx-Q differential signals sent by the baseband processing module are filtered by the I and Q shaping filters, and then the signals are sent to the Tx-I and Tx-Q signals sent by the baseband processing module of the intermediate frequency chip SE7051L10 The differential signals are sent to pins 24, 25, 22, and 23 of the intermediate frequency chip SE7051L10 after passing t...
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The invention discloses a Winmax broad band wireless communicating radio frequency system which mainly includes an intermediate frequency chip Se705lL1O and a radio frequency chip TRF2436. The SE7051L1O intermediate frequency chip finishes converting into a fixed intermediate frequency of 380MHz on an I baseband signal and a Q baseband signal in a launching time slot, finishes converting into the I baseband signal and the Q baseband signal of zero intermediate frequency under the received fixed intermediate frequency of 380MHz in the receiving time slot and finishes synthesizing the LO function needed by IF and RF; wherein, the frequency of the intermediate frequency LO is a fixed 380MHz and an RF local oscillation frequency can be selected so as to be convenient for the system to work in an anticipant operating channel. The TRF2436 finishes converting into a needed RF channel frequency on the fixed intermediate frequency signal of 380MHz in the launching time slot. When a point-to-point testing is carried out, the broad band of the channel is 3.5 MHz and a receiver sensitivity is -75dBm (64QAM-3 / 4), being 2dB superior to the 802.16d agreement standard.
Description
technical field [0001] The invention relates to the communication field, in particular to a Wimax broadband wireless communication radio frequency system. Background technique [0002] In recent years, the IEEE802.16 series of broadband wireless access technology standards has drawn wide attention from the industry. World's largest telecom equipment manufacturers such as Intel have established the WiMAX Forum to coordinate the interoperability of network equipment and promote the development and popularization of WiMAX. As a broadband wireless access technology positioned for outdoor applications, WiMAX has a series of notable features both from the technical point of view and from the application point of view. It is very attractive both to users and to telecom operators. [0003] 802.16d is a revised version of 802.16, and it is also a relatively mature and most practical standard version, which was officially released in the second half of 2004. 802.16d specifies the ph...
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IPC IPC(8): H04B1/40H04B7/00
Inventor 赵小虎丁韡唐述强倪晓清宋波刘学武水泉茹炎
Owner ANHUI SUN CREATE ELECTRONICS