Compressed sampling method for multiband signal

A signal compression, multi-band technology, applied in electrical components, code conversion and other directions, can solve the problems of limited signal frequency range applicable to multi-coset compression sampling system, low full power bandwidth of analog front end, etc., to avoid low full power bandwidth Effect
CN104901705AInactive Publication Date: 2015-09-09HARBIN INST OF TECH
5 Cites 5 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2015-09-09
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a compressed sampling method for a multiband signal, relates to the field of multiband signal sampling, and solves the problem of limitation of a signal frequency application range of a multi-coset compressed sampling system due to low full-power bandwidth of an analog front end of the existing multi-coset compressed sampling system. The method adopts p channels to sample a signal x(t), and a specific sampling method of an ith channel comprises the following steps of carrying out frequency mixing on the multiband signal x(t) and a signal Mi(t) to obtain a signal (FORMULA) after frequency mixing; filtering the signal (FORMULA) by adopting an ideal low-pass filter h(t) with the cut-off frequency of f0 / 2; sampling under the frequency fs=f0 by adopting an analog-digital converter in order to obtain a sampling sequence yi[n]; reconstructing by a reconstruction algorithm through p sampling sequences y[n]=(y1[n] to yi[n] to yp[n]) in order to obtain sequences d[n]=(dL0[n] to dL0[n])<T>, and thereby completing compressed sampling for multiband signal. The compressed sampling method is suitable for sampling the multiband signal with the unknown carrier frequency.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of multi-band signal sampling. Background technique

[0002] In the field of wireless communication, each frequency band is allocated to specific authorized users, and unlicensed users cannot use spectrum resources, making spectrum a very precious and limited resource. However, in practical applications, it is found that in the time-frequency plane, there are very few frequency bands that are actually occupied in the entire spectrum in a certain short period of time, and most of the frequency bands are in an idle state. At this time, a multi-band signal is formed. This situation causes a waste of spectrum resources, and at the same time provides the possibility of short-term information transmission for unauthorized users. Unauthorized users cannot occupy the frequency band that authorized users are using, so the occupancy of the frequency band needs to be confirmed before each information transmission. This is the f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More