• Mod-01 Lec-14 Generation and Properties of PN Sequences
    Articles,  Blog

    Mod-01 Lec-14 Generation and Properties of PN Sequences

    Welcome to the course on 3G and 4G wireless mobile communication systems. We are discussing code division for multiple access or we said that CDMA. Code division for multiple access is a multiple access technology on which third generation wireless communication systems are based. Last lecture we looked at the fundamentals of how C DMA decouples or distinguishes, the received signal of different users on the common air interface using different codes. We said that is possible through the use of the orthogonal code for instance. I have here two codes; C 0 C 1, which are orthogonal that is that dot product or inner product is 0. Hence, using…

  • Lecture 29: CDMA Codes: Properties of PN Sequences
    Articles,  Blog

    Lecture 29: CDMA Codes: Properties of PN Sequences

    Hello welcome to another module in this massive open online course on the principles of MIMI, CDMA, OFDM wireless communication systems. So, in the previous lecture we were looking at CDMA and how to generate the code sequences for CDMA which stands for code division for multiple access and we have said that the CDMA code sequences are generated as PN sequences. So, for CDMA when we look at CDMA the code sequence of CDMA is generated as a PN sequence which stands for a Pseudo Noise. The sequence it looks like a random series of 1Õs and plus 1Õs and minus 1Õs, this is generated as a PN sequence…