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Transceiving method and realization device thereof used for single frequency network signals

A single frequency network and signal technology, applied in multi-frequency code systems, preventing/detecting errors through diversity reception, baseband system components, etc., can solve the problem that the received signal cannot be effectively analyzed, etc., to increase the channel burden and increase the gain Effect

Inactive Publication Date: 2013-07-03
SHANGHAI JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention aims at the above-mentioned deficiencies existing in the prior art, and provides a method for transmitting and receiving signals of a single frequency network and an implementation device thereof, aiming at multipath interference caused by the same frequency in overlapping coverage areas of a single frequency network, resulting in received signals that cannot be effectively resolved For the problem, the PN frame header is encoded before modulation, and then the data is spliced, modulated and sent; when receiving, the received coded PN frame header and the known PN frame header are correlated and channel estimated to obtain transmit a signal

Method used

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  • Transceiving method and realization device thereof used for single frequency network signals
  • Transceiving method and realization device thereof used for single frequency network signals
  • Transceiving method and realization device thereof used for single frequency network signals

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Embodiment Construction

[0026] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0027] like figure 1 As shown, the application environment of this embodiment is a single frequency network containing more than two transmission points, and the transmission signal of each transmission point is based on a first-order cycle data structure, and its basic unit is a frame, including: PN for recording system information Frame header and data segment;

[0028] like figure 2 As shown, it is the transmitting part of the SFN transmitting signal, where:

[0029] At the transmitting end: the transmitting signal of the present embodiment single frequency network is based on the data structure of first-ord...

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Abstract

The invention discloses a transceiving method and a realization device thereof used for single frequency network signals in the technical field of digital television networks, which comprise the steps as follows: a PN frame header after PN frame header time coding processing and transmitting signal combined processing is inserted in front of a data section at a transmitting end; moreover, relevant PN processing and channel estimation processing are implemented at a receiving end. Aiming at solving a problem that received signals can not be effectively resolved due to multipath interferences caused by the single frequency network in overlapping areas, coding processing is implemented on the PN frame header before modulation, and then data jointing and demodulating transmitting are implemented; during receiving, a transmitting signal is obtained through relevant processing and channel estimation on the received and coded PN frame header as well as known PN frame header. The invention greatly improves the signal-to-noise of the channels, and can obtain an effective signal from the interfered signals more easily.

Description

technical field [0001] The present invention relates to a method in the field of digital television network technology and an implementation device thereof, in particular to a method for transmitting and receiving signals of a single frequency network and an implementation device thereof. Background technique [0002] Single-frequency networking is a beneficial coverage method brought about by the digitization of TV broadcasting. It can significantly reduce the cliff effect brought about by digital coverage and make the coverage field strength more uniform. In single-frequency networking, the data stream is divided into continuous data frames for transmission. Each data frame contains a PN frame header and a data segment. The data frame is then filtered by the baseband to form a baseband signal. Before transmission, the transmitter will The baseband signal is modulated to the specified frequency point for transmission; when receiving, the tuner converts the high-frequency si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04L25/02H04L27/26
Inventor 管云峰王新兵钱良
Owner SHANGHAI JIAOTONG UNIV
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