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AssigneeSamsung Thales Co., Ltd.
InventorsKi-Yun Kim, Ho Kim, Jun-Yup Lee, Hyung-Jin Choi
Estimating the term…
Provided is a frame synchronization pattern design and synchronization method by which in a transmitter of a communications system employing an orthogonal frequency division multiplexing (OFDM), a frame synchronization pattern is inserted into the starting part of a symbol frame, and by detecting the frame synchronization pattern in a receiver, synchronization of the OFDM transmitter and receiver is performed. Also, provided are a transmitter synchronization apparatus including an OFDM symbol frame generation unit, a frame synchronization pattern insertion unit, and an OFDM transmission signal conversion unit, and a receiver synchronization apparatus comprising a frame synchronization pattern inserted OFDM symbol frame conversion unit, a frame synchronization pattern detection unit, and a source data generation unit. Overcoming the conventional notion depending on the earlier art OFDM symbol standards, the OFDM symbol frame start detection method according to the present invention places a free-length code pattern, which is separately generated in a time domain, in the starting point of a frame and detects this pattern such that accuracy and efficiency greatly improve. Also, since the power value of a received signal is detected in the method, the communications system operates regardless of the frequency offset and phase offset. In addition, since a free-length pattern can be designed, the start point of a frame can be accurately detected in a seriously fading channel, by detecting a maximum peak based on correlation.
An apparatus for symbol frame synchronization of an orthogonal frequency division multiplexing transmitter comprising:
A method for symbol frame synchronization of an orthogonal frequency division multiplexing transmitter comprising:
An apparatus for symbol frame synchronization of an orthogonal frequency division multiplexing receiver, comprising:
A method for synchronization of an orthogonal frequency division multiplexing receiver comprising:
An apparatus for symbol frame synchronization of an orthogonal frequency division multiplexing transmitter and receiver comprising:
A method for symbol frame synchronization of an orthogonal frequency division multiplexing transmitter and receiver comprising:
An apparatus, comprising:
An apparatus, comprising:
A computer-readable medium having stored thereon a data structure comprising:
Dependencies are inferred from the claim text.
From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Details of reference signals: structure of the reference signals
Synchronisation arrangements: frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe…
Digital communication
Term end not estimated
This application makes reference to, incorporates the same herein, and claims all benefits accruing under 35 U.S.C. §119 from an application for DEVICE AND METHOD FOR SYMBOL FRAME SYNCHRONIZATION OF OFDM TRANSMITTER AND RECEIVER earlier filed in the Korean Intellectual Property Office on Apr. 15, 2002 and there duly assigned Serial No. 2002-20418.
1. Field of the Invention
The present invention relates to a frame synchronization pattern design and synchronization method, by which in a transmitter of a communications system employing an orthogonal frequency division multiplexing (OFDM), a frame synchronization pattern is inserted into the starting part of a symbol frame, and by detecting the frame synchronization pattern in a receiver, synchronization of the OFDM transmitter and receiver is performed.
A more complete appreciation of the invention, and many of the attendant advantages thereof, will be readily apparent as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings in which like reference symbols indicate the same or similar components, wherein:
FIG. 1 is a diagram of the structure of an orthogonal frequency division multiplexing (OFDM) transmitter symbol frame synchronization apparatus;
FIG. 2 is a detailed diagram of the structure of an OFDM symbol frame generation unit;
FIG. 1 is a diagram of the structure of a transmitter symbol frame synchronization apparatus which synchronizes an orthogonal frequency division multiplexing (OFDM) transmitter with an OFDM receiver by inserting a frame synchronization pattern.
Unlike in an ordinary OFDM transmitter, the transmitter symbol frame synchronization apparatus according to the present invention inserts a frame synchronization pattern (FSP) in the front part of a frame in a time domain. For the OFDM, an OFDM symbol frame generation unit 11 collects a predetermined number of bits of digital source data formed of 1's and 0's and generates OFDM type symbols to transmit the bits as a signal. A predetermined number of the various OFDM symbols are collected and then form one frame.
In order to easily perform symbol frame synchronization of the OFDM transmission and reception system, a frame synchronization pattern insertion unit 12 inserts a frame synchronization pattern which is determined by the user in advance, in the front part of the OFDM symbol frame. An OFDM transmission signal conversion unit 13 converts the OFDM symbol frame into a high frequency analog transmission signal so that the OFDM symbol frame can be demodulated after the OFDM symbol frame is transmitted and then received by the OFDM receiver.