Multi-carrier low MF signal generator and signal generating method
A technology of signal generator and digital intermediate frequency signal, which is applied in multi-frequency code system, multiplexing communication, orthogonal multiplexing system, etc., can solve the problem of multiple resources, expand the scope of use, and be easy to miniaturize , good feasibility effect
Inactive Publication Date: 2008-11-05
COMBA TELECOM SYST CHINA LTD
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Problems solved by technology
Accumulation and summing are carried out at the last stage. After the digital up-conversion processing, the final data rate is very high. In this way, the accumulation processing needs the support of the addition tree, which requires more resources.
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[0049] Such as figure 1 The multi-carrier low-IF signal generator shown includes a PC and its respectively connected baseband I and Q signal generators and multi-carrier digital up-conversion subsystems, D / A converters, clock subsystems, and microchip control sub-systems. The baseband I and Q signal generators are also connected to the multi-carrier digital up-conversion subsystem and the D / A converter in sequence; the clock subsystem is also connected to the baseband I, Q signal generation and multi-carrier digital up-conversion sub-systems. The system, the D / A converter, the clock subsystem, and the microchip control subsystem are simultaneously connected; the microchip control subsystem is also connected to the baseband I and Q signal generators, the multi-carrier digital up-conversion subsystem, and the D / A converter , The clock subsystem is connected at the same time; the D / A converter is provided with a multi-carrier low-IF signal output terminal.
[0050] Among them, the D...
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The invention discloses a multicarrier low intermediate frequency signal generator, including a PC machine, a baseband I, Q signal generator connected respectively, a multicarrier digital up-conversion sub-system, a D / A converter, a clock sub-system, a microchip control sub-system, and the baseband I, Q signal generator is connected with the multicarrier digital up-conversion sub-system, the D / A converter in turn; the clock sub-system is connected with the baseband I, Q signal generator, the multicarrier digital up-conversion sub-system, the D / A converter, the clock sub-system and the microchip control sub-system at the same time; the microchip control sub-system is connected with the baseband I, Q signal generator, the multicarrier digital up-conversion sub-system, the D / A converter and the clock sub-system at the same time; the D / A converter is provided with a plurality of multicarrier low intermediate frequency signal output ends. The multicarrier signal generator has good performance and feasibility, strong system flexibility and extensibility, which is easy to realize the multicarrier low intermediate frequency signal generator with miniaturization and low energy consumption.
Description
Technical field [0001] The present invention relates to the field of mobile communication, in particular to a multi-carrier low-IF signal generator and a signal generation method thereof. Background technique [0002] With the development of mobile communication, the number of mobile communication users has also increased sharply. Operators have to expand the capacity of mobile communication systems. Mobile communication systems have gradually evolved from single-carrier to multi-carrier systems to meet the communication needs of users. [0003] As the demand for multi-carrier systems increases, there is an urgent need to develop communication systems that support multi-carrier functions. In this way, in the development of communication systems, multi-carrier signal sources need to be tested and verified. A major defect of the existing multi-carrier signal source is that when a multi-carrier signal is output, a large intermodulation signal appears, which makes it impossible to us...
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Login to View More IPC IPC(8): H04L27/26H04J11/00
Inventor 胡应添张远见张跃军
Owner COMBA TELECOM SYST CHINA LTD