JPH0242849A - Receiver - Google Patents

Abstract

PURPOSE:To execute the data decoding of high reliability by using receiving power level data at the time of reception to be measured with a receiving power measuring device in a decoding part or a receiving part and executing the error correction of receiving data to be outputted from a demodulating part. CONSTITUTION:A digital signal to be inputted from an antenna 11 is received by a receiving part 12 and a receiving power level is measured by a receiving power measuring device 12A simultaneously. The receiving signal is outputted to a demodulating part 13 and the receiving power level data are outputted to a decoding part 14. Receiving data, for which an output to be received by the receiving part 12 is demodulated to binary data by the demodulating part 13, are outputted to the decoding part 14. Accordingly, the decoding part 14 stores the receiving power level data and receiving data and executes the decoding by using the receiving power level data when the error correction is executed for the receiving data. Although it is explaned as an example that the receiving power level data are used for the error correction, even when deciding level data are used at the time of decision, the error correction can be executed samely as the execution example.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a receiving device suitable for mobile communications and the like that receives digital signals.

BACKGROUND OF THE INVENTION FIG. 2 is a block diagram showing a conventional receiving apparatus. A digital signal input from an antenna 1 is received by a receiving section 2 and demodulated into binary data by a demodulating section 3.

Then, the decoding unit 4 corrects errors in the received data using check bits added in advance for error correction on the transmitting side, and decodes the data.

Problems to be Solved by the Invention However, in the conventional receiving device described above, error correction is performed based on the pattern of received data, that is, the same reliability cannot be achieved for all judgment values regardless of the received power level at the time of judgment. Since error correction is carried out in advance, there is a problem in that if the received power level changes, the received data will have a fluctuating determination value, making it impossible to receive the data with high reliability.

The present invention is intended to solve these conventional problems, and it is an object of the present invention to provide a receiving device that can perform highly reliable data decoding.

Means for Solving the Problems In order to achieve the above object, the present invention includes a receiving section having a received power measuring device for determining the received power level at the time of reception;
The apparatus includes a decoding section that performs error correction on the received data outputted by the demodulation section using the received power level data outputted from the received power measuring device.

Therefore, according to the present invention, the decoding section corrects errors in the received data output by the demodulating section using received power level data at the time of reception measured by the received power measuring device of the receiving section.

Embodiment FIG. 1 is a block diagram showing a receiving apparatus according to an embodiment of the present invention.

In FIG. 1, 11 is an antenna, 12 is an antenna 11
A receiving power measuring device 12A is provided to measure the received power level.

Reference numeral 13 indicates a demodulation unit that demodulates the output of the reception unit 12 into binary reception data, and 14 indicates a decoding unit.
Error correction is performed using the received power level data output by the receiver.

Next, the operation of the above embodiment will be explained.

In the above embodiment, the digital signal input from the antenna 11 is received by the receiving section 12, the received power level is measured by the received power measuring device 12A at the same time, the received signal is output to the demodulating section 13, and the received power level data is is output to the decoding section 14.

Then, the output received by the receiving unit 12 is demodulated into binary data by the demodulating unit 13, and the received data is output to the decoding unit 14.

Therefore, the decoding unit 14 stores received power level data and received data, and decodes using received power level data when correcting errors in received data.

Next, two examples of methods for decoding received data will be shown.

First, a certain threshold is set for the reception power level, and bits whose reception power level is lower than the threshold at the time of binary determination are assumed to have disappeared, and erasure correction is performed as error correction.

If there are no bits that are considered lost, conventional error correction is performed.

By performing error correction in this manner, erasure correction can correct more errors than normal error correction, and thus error correction of received data can be effectively performed.

The second method is not to set a threshold value for the reception power level, but to select as many bits as possible for erasure correction starting from the lowest reception power level at the time of binary determination, assume erasure, and perform erasure correction.

In the above embodiment, an error correction code that corrects bits is explained, but the present invention can also be applied to error correction that corrects several bits per symbol.

Further, although an example in which received power level data is used for error correction has been described, error correction can be performed using judgment level data at the time of judgment in the same manner as in the embodiment.

Effects of the Invention As is clear from the above embodiment, the present invention has a configuration in which error correction is performed using received power level data.
This has the advantage that highly reliable data decoding can be performed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a receiving device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional receiving device. DESCRIPTION OF SYMBOLS 11... Antenna, 12... Receiving section, 12A... Received power measuring device, 13... Demodulating section, 14... Decoding section.

Claims (1)

[Claims] A receiving section that has a received power measuring device that measures the received power level of a signal input from an antenna, a demodulating section that converts the received signal outputted from the receiving section into binary data, and a demodulating section that converts the received signal outputted from the receiving section into binary data. , and a decoding unit that performs error correction using received power level data output from the received power measuring device.