Simple Error Detection Method
نویسنده
چکیده
In any communication system, the received signal will differ from the transmitted signal due to various transmission impairments. For analog signals, these impairments introduce various random modifications that degrade signal quality. For digital signals, bit errors are introduced: A binary 1 is changed into a binary 0 and vice versa. Increase in data rate of a digital transmission system increases the bit error rate. Longer the digital data, the more bits it has and the probability that one of these bits is in error increases. At the receiving end of a digital transmission system, it is always desirable to receive data with fewer bit errors. This motivates the use of errordetection techniques. Various types of error detection techniques and codes are used. Some are used for detection of single bit errors and some are for burst errors or multiple bit errors. In this paper, a simple error detection technique is proposed by which a receiver can easily detect most types of bit errors i.e. both single bit and multiple bit errors. The proposed technique is based on a basic arithmetic operation i.e. counting. By counting the total number of 1’s and 0’s in the binary data to be transmitted, we can detect the errors in the received data. The performance of the proposed simple error detection technique is evaluated by comparing it with the existing techniques i.e. parity check, Cyclic Redundancy Check (CRC) and checksum. This paper also discusses about the shortcomings of this simple error detection technique.
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تاریخ انتشار 2013