Unlock instant, AI-driven research and patent intelligence for your innovation.

PCM data roll-off filtering processing method

A filter processing and roll-off technology, applied in the direction of digital technology network, impedance network, electrical components, etc., can solve the problems of multi-computing resources, FPGA data processing platform general design troubles, occupation, etc., to simplify the calculation process and shorten the processing time cycle, effect of reducing occupancy

Active Publication Date: 2021-09-21
SHANDONG INST OF AEROSPACE ELECTRONICS TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different data processing clock frequency requirements have caused great troubles to the general design of FPGA data processing platforms
[0007] 2. The roll-off filter requires a lot of multiplication and addition operations, which takes up more computing resources

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • PCM data roll-off filtering processing method
  • PCM data roll-off filtering processing method
  • PCM data roll-off filtering processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1, a roll-off filter for the PCM data processing method adopted design ideas are as follows:

[0048] Baseband data pulse sequence represented by the following formula,

[0049]

[0050] Wherein, δ (t) is the impulse function, d n Baseband data, a value of +1 or -1, T b The symbol period;

[0051] For baseband data filter roll-off process, as shown in the following formula to baseband data pulse sequence with roll-off filter impulse response function h (t) obtained by multiplying convolution,

[0052]

[0053] Depending on the nature of the impulse function, δ (t-t 0 ) * H (t) = h (t-t 0 ), Then the above equation (3.2) reduces to,

[0054]

[0055] In the above Equation 3.2 to 3.3, r (t) is a baseband data rolloff filter, h (t) is the roll-down impact filter response function.

[0056] As can be seen from equation 3.3, the baseband data filter roll-off may be considered as the impulse response time shift function, is superimposed on the time domain.

[0057] ...

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

PUM

No PUM Login to View More

Abstract

According to a PCM data roll-off filtering processing method provided by the invention, the time domain superposition calculation is adopted according to the time value of an impact response function so as to carry out roll-off filtering processing; therefore, the technical requirements on the universal design of an FPGA data processing platform are reduced, and the design purposes of reducing the occupied computing resources and shortening the data processing time through a small amount of additive operation are achieved. The method comprises the implementation steps of 1 carrying out time domain discretization on the impact response function h (t); 2 converting baseband data and a natural impact function sequence; 3 performing time domain waveform fitting; and 4 time domain superposition calculation: sampling the roll-off filtering impact response function according to the equivalent moments of a plurality of data symbols before or after the current moment, and carrying out superposition calculation on the influence of all the data symbols.

Description

Technical field [0001] The present invention relates to a method for filtering PCM data based FPGA architectures implemented rolloff, belonging to the wireless communication field. Background technique [0002] Before a wireless communication system transmitting modulated baseband data signal, for the efficient use of spectrum and to prevent interference problems, generally baseband data filter roll-off process between codes. [0003] Especially for use as a data processing FPGA hardware platform on the simplicity of the hardware architecture, the existing roll-off filter to take integral multiple interpolation filter, as disclosed in the prior patent CN201610596082.X, which process comprises: (1) Zhong Duiji tape when using the baseband data rate of a high speed integer multiple of N data high power sampling, data samples zero padding, i.e., the first point of the original baseband data, the second to the N-point data is filled with zeros; (2) high magnification sample after the...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H03H17/02
CPCH03H17/0211
Inventor 童亚钦邵飞康峰源张伟李汶芯
Owner SHANDONG INST OF AEROSPACE ELECTRONICS TECH