Evolution from TD-SCDMA to future

Enviado por Valentin De Jesus

Resúmen

In recent years, along with the continuous development of
network and communication technologies and the global
commercialization of the 3G (3rd Generation Mobile Communication
System), the support for the data service and unsymmetrical
service has encountered a greater improvement compared with the
2G (2nd Generation Mobile Communication System), and also the
diversity of services is better. At the same time, the
requirements for higher data rate and higher quality wireless
communication service are brought forward by users. On the one
hand, the conflict of rapidly growing numbers of users and
limited bandwidth resources becomes outstanding, so the spectrum
effi ciency of system should be improved by adopting some
advanced technologies. On the other hand, it has been proved in
both theory and practice that some novel key technologies, such
as MIMO (multiple input, multiple output) and OFDM (orthogonal
frequency division multiplexing), can improve the performance of
current mobile communications systems. Also, many problems need
to be improved in the current system while providing service with
high data rates and high performance. Therefore, the research of
next-generation mobile communication systems has been put into
the calendar.

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Enviado por Valentin De Jesus