Communication receiving device and method for operating the same
AssigneeSamsung Electronics Co., Ltd.
InventorsHyun Bae Jeon, Jun Ha Im, Hyeon Cheol Jeong, Sung Soo Kim
Life of this patent
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Abstract
A communication receiving device is provided. The communication receiving device includes a cross-correlation measuring circuit which receives an L-SIG (Legacy signal) symbol and a RL-SIG symbol to measure a cross-correlation degree therebetween, an accumulating circuit which accumulates a real part of a cross-correlation degree measurement value, a comparator which compares the accumulated L-SIG symbol and the RL-SIG symbol with a variable threshold value, and a threshold value calculator for calculating the threshold value.
Claims18
A communication receiving device comprising:
- a cross-correlation measuring circuit configured to repetitively measure a cross-correlation degree between a received legacy signal symbol (“L-SIG”) of a preamble within a data frame, and a second symbol succeeding L-SIG;
- an accumulating circuit configured to accumulate a real part of results of the repetitive cross-correlation degree measurements;
- a comparator configured to compare the accumulated real part of the results with a variable threshold value and based on the comparison, to indicate whether the second symbol is a repeated symbol (“RL-SIG”) of L-SIG;
- a threshold value calculator configured to calculate the variable threshold value;
- and
- an Error Vector Magnitude circuit configured to detect whether there is an error in RL-SIG after a demodulation of L-SIG and a subsequent Orthogonal Frequency Division Multiplexing (OFDM) symbol of L-SIG.
A communication receiving device comprising:
- an Error Vector Magnitude (EVM) circuit configured to detect whether there is an error in a repeated L-SIG (“RL-SIG”) symbol after demodulating a legacy signal symbol (“L-SIG”) and a Orthogonal Frequency Division Multiplexing (OFDM) symbol received subsequent to the L-SIG symbol;
- a cross-correlation measuring circuit configured to receive the L-SIG symbol and the RL-SIG symbol and measure a cross-correlation therebetween;
- an accumulator configured to accumulate a real part of a cross-correlation degree measurement value;
- a comparator configured to compare the accumulated L-SIG symbol and the RL-SIG symbol with a threshold value, the threshold value being variable depending on a predetermined characteristic value;
- and
- a validation circuit configured to demodulate and decode the L-SIG symbol to verify validity thereof.
A method for operating a communication receiving device, the method comprising:
- receiving a legacy signal (“L-SIG”) symbol and a repeated symbol (“RL-SIG”) of the legacy signal through a cross-correlation measuring circuit to measure a cross-correlation therebetween;
- accumulating a real part of a cross-correlation degree measurement value through an accumulator;
- comparing the accumulated L-SIG symbol and the RL-SIG symbol with a variable threshold value through a comparator;
- calculating the threshold value through a threshold value calculator;
- and
- demodulating the L-SIG symbol and a subsequent OFDM (Orthogonal Frequency Division Multiplexing) symbol of the L-SIG symbol through an EVM (Error Vector Magnitude) circuit, and thereafter detecting whether there is an error in the RL-SIG symbol.
Dependencies are inferred from the claim text.