Method and sytem for receiving multi-carrier signal

Abstract

Method and system for reducing impulsive burst noise in less delayed reception in pilot based OFDM systems, especially using DVB-T standard such as Digital Video Broadcasting (DVB) is provided. The method contains following steps: recognition of the impulse position and possibly length in the time domain symbol, blanking of those samples of the symbol where significant amount of impulse noise is present, calculating the first estimate of the received signal from the blanked symbol, derving correction values for the carrier estimates by applying prior information (pilot carriers), and the corrected estimate of the received symbol is derived by subtracting the correction values of step from the first estimate of carriers derived in step. The method and arrangement allow correction of fairly long bursts of impulse noise with minor degradation only. The complexity of the scheme and the additional energy consumption are fairly low. The method provides considerably more effective more simple and less delay in broadcast data reception than previously known solutions in interfered multi-carrier signal reception.

Description

technical field [0001] The present invention relates to systems and methods for distributing data over communication links. Background technique [0002] Radio broadcasting has a history of almost a century. Even TV has a history dating back to the 1930s. Throughout the world, radio has successfully brought entertainment and information to audiences. [0003] The latest step in broadcasting is the digitization of radio broadcasting and TV. Digital radio broadcasting has not gained much market acceptance. However, many hope that digital TV will bring new benefits and services to consumers, thereby generating new revenue streams for the broadcasting industry. However, the fundamentals of the TV service itself have not changed much. Instead, even with digital, TV remains the same. [0004] During the second half of the 1990s, the Internet became increasingly popular. In a short transformative and hyped-up period, a whole host of new services and content become available ...

AI Technical Summary

Problems solved by technology

Unfortunately, the method described in this reference requires solving a complex system of equations, which is cumbersome and cumbersome (generalized matrix inversion, with matrices having dimensions of hundreds or even thousands)

It's complicated, it's hard to solve

Also in systems with thousands of carriers received over noisy channels (e.g. OFDM systems), relying only on the portion of the spectrum in the guard band proves to be inefficient

does not reliably solve for missing samples

Furthermore, the receiver cannot perform the theoretically complex calculations required

Also, the information about guard bands is easily corrupted by noise, the answer is inaccurate

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