Implementing a Power Efficient PN Sequence Generator Using Spintronic Devices for Code Division Multiple Access Based Wireless Mobile Communication

摘要

In recent years code division multiple access (CDMA) are the most important technology in the field of mobile communication where low power consumption, high operating speed and high integration density equipments are financially indispensable for making mobile set compact, handy and user convenient. For the Direct Sequence Spread Spectrum (DSSS) system which is the heart of CDMA, PN sequence generator is very essential and it is expected that it should be power efficient. As an attempt towards the power efficient system for wireless mobile communication, we present here the design of 'PN Sequence Generator' with the help of "spintronics" or "spin based electronics" where classical binary bit '1' and V are encoded in orthogonal spin polarization of single electron confined in a quantum dot and placed in a magnetic field. Galvanomagnetic Resistance (GMR) is to be used to write 'input spin' and read 'output spin' from designated input and output cells. GMR helps to make sensors that can sense or 'read' extremely tiny spintronic devices. The advantage of spintronic device is that they require much less power than conventional technologies whilst operating at much higher speed.