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Golay sequences have been studied for more than five decades since Golay first discovered those sequences. However, the periodic autocorrelation of a single Golay sequence is unknown. In this paper, for H≥ 2 being an arbitrary even integer, we show there exist three different constructions of H-ary Golay sequences with a zero autocorrelation zone(More)
Sequences with good correlation properties have been widely adopted in modern communications, radar and sonar applications. In this paper, we present our new findings on some constructions of single H-ary Golay sequence and 4-QAM Golay complementary sequence with a large zero autocorrelation zone, where H ≥ 2 is an arbitrary even integer and q ≥ 2 is an(More)
With the emergence of multi-carrier (MC) orthogonal frequency division multiplexing (OFDM) scheme in the current WLAN standards and next generation wireless broadband standards, the necessitation to acquire a method for combating high peak to average power ratio (PMEPR) becomes imminent. In this thesis, we will explore various sequences to determine their(More)
Sequences with good correlation properties have been widely adopted in modern communications, radar and sonar applications. In this paper, we present our new findings on some constructions of single H-ary Golay sequence and 4-QAM Golay complementary sequence with a large zero autocorrelation zone, where H ≥ 2 is an arbitrary even integer and q ≥ 2 is an(More)
OBJECTIVE To investigate pesticide abuse on fruits and vegetables in Tianjin Area, to detect pesticide residues in fruits and vegetables, to study the methods for reducing pesticide residues in fruits and vegetables. METHODS (1) A questionnaire on the pesticide application during growing fruit and vegetable was administered to 185 farmers in Tianjin Area.(More)
RFID technology has gained tremendous popularity in the recent years. The tiny, inexpensive RFID tags can be easily attached to objects for seamless identification. However, one glaring weakness of RFID tags, especially passive RFID tags is its lack of capability for implementing strong crypto primitives for security purposes. When no or a weak crypto(More)
Encryptions are used in almost all standards to ensure the confidentiality of the data. Encryptions can be and indeed are implemented in the different layers of a network protocol stack. Conventional encryption performs the bitwise XOR operation between one message bit and one key stream bit to generate one ciphertext bit. Huo et al. have recently proposed(More)
Sequences with good correlation properties have been widely adopted in modern communications, radar and sonar applications. In this paper, we present that a single H-ary Golay sequence or 4<sup>q</sup>-QAM Golay sequence has a large zone of zero odd periodic autocorrelation, where H &#x2261; 0 (mod 4) is a positive integer and q &#x2265; 2 is an arbitrary(More)
Sequences with good correlation properties have been widely used in modern communications, radar and sonar applications. In this paper, we consider the autocorrelation property of the single binary and quaternary Golay sequences, with special focus on their zero periodic autocorrelation zone. Some examples along with one case of the proof will be given in(More)
The land area in river network is divided into some foursquare cells with certain scale for the demand of precision, proceeding from the physical mechanism of the rainfall-runoff and runoff pollution, the non-point source pollution from cells are estimated using the export coefficient of different land use types. According to the terrain of plain river(More)