Obaid ur Rehman

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Wireless Sensor Networks (WSNs) with their dynamic applications gained a tremendous attention of researchers. Constant monitoring of critical situations attracted researchers to utilize WSNs at vast platforms. The main focus in WSNs is to enhance network life-time as much as one could, for efficient and optimal utilization of resources. Different approaches(More)
Message Authentication Codes (MACs) are very sensitive to any modification in the message. The verification fails even if there is a slight change in the message. However, special algorithms have been introduced that tolerate a small amount of noise in messages as required by some applications. Noise Tolerant Message Authentication Code (NTMAC) is an(More)
One of the major issues in Wireless Body Area Sensor Networks (WBASNs) is efficient localization. There are various techniques for indoor and outdoor environments to locate a person. This study evaluating and compares performance of optimization schemes in indoor environments for optimal placement of wireless sensors, where patients can perform their daily(More)
In recent few years Wireless Sensor Networks (WSNs) have seen an increased interest in various applications like border field security, disaster management and medical applications. So large number of sensor nodes are deployed for such applications, which can work autonomously. Due to small power batteries in WSNs, efficient utilization of battery power is(More)
BACKGROUND Proteinuria severe enough to be in the nephrotic range has been noted on occasion in patients with obstructive sleep apnea (OSA), but it is not known what factors are related to the severity of proteinuria in these patients. This study was conducted to determine if the severity of proteinuria is related to the number of apneas. METHODS The(More)
A key benefit of channel coding is the ability to protect data against channel impairments. Essentially, the channel coder adds redundancy bits that provide a way to correct corrupted data. Encryption is another way of protecting data against channel impairments and unintended interception or forging. This paper introduces an efficient approach of(More)
In this paper a novel scheme is introduced to perform the soft input decoding of Reed Solomon Codes using iterative bit flipped decoding based on the LLRs of the received bits. MAP is used as the inner decoder to obtain the LLRs for the decoded bits at the receiver. In case of decoding failure or a decoding error by the outer RS decoder, a combination of(More)