Optical radio frequency channelization implementation method for even number of radio frequency channels
An implementation method and radio frequency channel technology, applied in the field of optical communication, can solve the problems of difficulty in implementation, high production cost, and large comb tooth interval, and achieve the effect of relieving the large comb tooth interval and reducing the comb tooth interval
Active Publication Date: 2021-07-16
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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Problems solved by technology
However, this technical solution still has the problem that the interval between the teeth of the optical frequency comb is relatively large, making it difficult to realize and high in production cost.
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[0046] The following takes the channelization of 11-13GHz signals according to the bandwidth of 0.5GHz as an example to start analysis. i.e. f 1 =11GHz, f 2 =13GHz, f BW = 0.5GHz. FSR calculated according to Equation 1 and Equation 2 respectively signal and FSR local They are: (47GHz, 24GHz) and (47GHz, 23GHz).
[0047] When FSR signal =47GHz, FSR local =24GHz, according to image 3 As shown, two signal optical combs are required, and the channels collected from the four sidebands are: (13GHz-12.5GHz), (11GHz-11.5GHz), (12GHz-11.5GHz), (12GHz-12.5GHz).
[0048] When FSR signal =47GHz, FSR local =23GHz, according to image 3 As shown, three signal optical combs are required, and the channels collected from the four sidebands are: (12.5GHz-13GHz), (11.5GHz-11GHz), (11.5GHz-12GHz), (12.5GHz-12GHz).
[0049] As can be seen from the embodiment, when the number of channels is an even number, the comb tooth interval FSR of the signal optical comb is calculated according t...
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The invention discloses an optical radio frequency channelization implementation method for even number of radio frequency channels. The optical radio frequency channelization implementation method comprises the following steps: defining fBW as an expected channel bandwidth, f1 as the minimum frequency of a to-be-processed RF signal, and f2 as the maximum frequency of the to-be-processed RF signal; according to the f1, f2 and fBW to be processed, the required comb tooth interval FSRsignal of the signal light frequency comb and the comb tooth interval FSRlocal of the local oscillation light frequency comb are configured, and the configuration formula is as follows: FSRsignal = 2 (f1 + f2)-2fBW, and FSRlocal = FSRsignal / 2 + / -fBW. In the optical radio frequency channelization system designed by adopting the method, the comb tooth interval of the optical comb and the sampling frequency of the periodic filter can be further reduced. Meanwhile, more possible choices are provided for radio frequency channelization scheme design based on optical comb double modulation sidebands.
Description
technical field [0001] The invention belongs to the field of optical communication, in particular to an optical radio frequency channelization method for even radio frequency channels. Background technique [0002] With the development needs of multi-band, large bandwidth, and flexible configuration, the radio frequency (RF) processing system as the core part needs to have the ability of frequency band transparency, large working bandwidth, channelization and simultaneous frequency conversion of RF signals in different working frequency bands. . At present, electrical methods are mainly used to process the received radio frequency signal through channelized reception, frequency conversion and transmission. The channelized working bandwidth of RF signals is limited below GHz; the same structure is generally not compatible with different frequency bands, that is, it does not have frequency band transparency; simultaneous frequency conversion of multiple signals introduces int...
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CPCH04B10/5165
Inventor 刘静娴顾杰钟欣陈智宇冷鉴霄
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP