Multi-mode radio communication network system

Abstract

This invention relates to a multi-mode radio communication network system including a multi-mode transmitter and a multi-mode receiver, in which, the transmitter is used in processing signals in various network modes by channel coding, symbol mapping and modulation, hierarchical space multiplex coding unit and transmitting them the same time or time-sharing, said receiver is used in receiving signals sent by the transmitter, processing them by the hierarchical space multiplex decoding unit, demodulating, de-mapping and channel decoding them to get the received signals of various network modes, in which, the base station in this invention can access said user station in different modes at the same time and the same frequency and time-sharing in the same frequency and the user station as well, different kinds of networks can coexist, user stations can switch among different networks in the mode of soft switch.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a multi-mode wireless communication network system. Background technique [0002] BLAST (layered space-time structure) is a way to improve bandwidth effectiveness in wireless communication, and it is a layered space-time structure for Bell Laboratories. The BLAST system uses multiple antennas to simultaneously transmit parallel data streams in the same frequency band, uses rich multipath to propagate different data streams, and can separate them at the receiver to achieve space diversity. Figure 1 is a schematic diagram of BLAST. Multiple transmitters use the same modulation method, and multiple receivers also use the same demodulation method. [0003] BLAST divides a single user's data stream into multiple sub-streams, and uses multiple antennas to transmit these parallel sub-streams at the same time. All sub-streams are sent in the same frequency band, s...

AI Technical Summary

Problems solved by technology

[0007] It is not difficult to see from the above description that in the existing technology, the demand for spectrum is relatively wide

The spectrum is precisely the scarce resource of the operator; in addition, there are several modes of user stations that need to have several frequency bands. The number of user stations is very small, because the frequency band corresponding to the mode with a small number of user stations cannot be adjusted to the mode with a large number of user stations, and the waste of spectrum resources is large

[0008] In addition, since various modes of networks occupy different frequency bands, subscriber stations cannot move and switch between heterogeneous networks in a soft handover manner.

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