Strict Band-Limited Efficient Modulation System Based on Shock Filter Shaping

An impulse filter and modulation system technology, applied in the field of information demodulation in communication systems, can solve problems such as shortage of spectrum resources, and achieve the effect of simple implementation and low cost

Active Publication Date: 2018-04-03
南京进芯信息科技有限公司
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Problems solved by technology

All over the world, telecom operators are accelerating the deployment of 4GLTE networks, but they all face a major problem: the shortage of spectrum resources
3) Deficiencies and improvements
Fig. 2(a) and Fig. 3(a) are analog shock filters realized by ceramic filter and crystal filter respectively, and Fig. 2(b) and Fig. 3(b) are the corresponding MPPSK shock filter responses. The author even showed the magical effect of passing the MPPSK signal with a code rate as high as 2Mbps with a -40dB bandwidth of less than 6kHz, and its impact effect is extraordinary

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  • Strict Band-Limited Efficient Modulation System Based on Shock Filter Shaping
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  • Strict Band-Limited Efficient Modulation System Based on Shock Filter Shaping

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Abstract

A strict band-limit high-efficiency modulation system based on shock filter shaping. The origin of the system includes a shaping filter to realize a strict band-limit communication system. By reducing the signal bandwidth, the spectrum utilization rate of the system signal is improved. The shaping filter The device is an impact filter; the receiving end of the system adopts an optimal receiver, and the optimal receiver utilizes the pre-stored impact waveform sample sequence obtained from the jump part widened after the shaping filter, as a correlation operation template Or the matched filter impulse response, slide the fixed step size to the position where the shock of the symbol [1,2,....,M] occurs in turn, and then do Matched filtering to demodulate the corresponding transmitted symbols; the system origin fully utilizes the "resonance" effect of the shock filter, which makes the strict band-limited system have little intersymbol interference effect, simple structure, low complexity, high spectral efficiency, and demodulation Good performance.

Description

Strict Band-Limited Efficient Modulation System Based on Shock Filter Shaping technical field The invention belongs to the field of information demodulation in communication systems, and relates to a digital communication system, in particular to a strict band-limited high-efficiency modulation system based on improved MPPSK pulse modulation. Background technique 1. Strict band-limited high-efficiency modulation system 1) Research Status All over the world, telecom operators are accelerating the deployment of 4GLTE networks, but they all face a major problem: the shortage of spectrum resources. As a result, the frontier of competition in the LTE industry has evolved into a battle for superior spectrum resources. According to an authoritative forecast, the 4G spectrum gap will reach 1035-1455MHz by 2020. It can be seen that in today's extremely tight spectrum resources, not to mention the sky-high price of spectrum price auctions, it is difficult to buy the most favora...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04L27/18H04L25/03
Inventor吴乐南卢从慧王继武
Owner南京进芯信息科技有限公司