Polar coordinate transmitter based on sd modulation module
A polar coordinate and transmitter technology, applied in the field of wireless communication, can solve problems such as power control difficulties and envelope accuracy damage, and achieve the effect of saving power consumption
Active Publication Date: 2019-03-19
WUXI ZGMICRO ELECTRONICS CO LTD
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Problems solved by technology
For such as figure 2 With the polar coordinate structure shown, it is difficult to implement power control directly
All digital envelope control words are already used to represent the envelope information, the equivalent envelope accuracy will be compromised if the power amplifier unit amplifier is switched off for power control
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[0022] The detailed description of the present invention directly or indirectly simulates the operation of the technical solution of the present invention mainly through programs, steps, logic blocks, processes or other symbolic descriptions. In the ensuing description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. Rather, the invention may be practiced without these specific details. These descriptions and representations herein are used by those skilled in the art to effectively convey the substance of their work to others skilled in the art. In other words, for the purpose of avoiding obscuring the present invention, well-known methods and procedures have not been described in detail since they have been readily understood.
[0023] Reference herein to "one embodiment" or "an embodiment" refers to a particular feature, structure or characteristic that can be included in at least one implementation of the pres...
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The invention discloses a polar coordinate transmitter. The polar coordinate transmitter comprises a polar coordinate conversion module, a power amplifier and an SD (Sigma-Delta) modulation module; the polar coordinate conversion module carries out polar coordinate conversion for an input signal to obtain a phase signal and an envelope signal; the power amplifier comprises multiple first type of power amplification units, multiple second type of power amplification units and multiple third type of power amplification units; input ends of all the power amplification units are connected to form an input end of the power amplifier; output ends of all the power amplification units are connected to form an output end of the power amplifier; the phase signal is coupled to the input end of the power amplifier; the SD modulation module performs modulation based on the envelope signal to obtain power amplification envelope control data; the power amplification envelope control data comprise first control data, second control data and third control data; and the first type of the power amplification units, the second type of the power amplification units and the third type of the power amplification units are controlled respectively based on the three types of the control data. Compared with the prior art, most power consumed by the power amplifier can be saved in a region with low output power.
Description
【Technical field】 [0001] The invention relates to the field of wireless communication, in particular to a polar coordinate transmitter based on an SD (Sigma-Delta) modulation module. 【Background technique】 [0002] Modern wireless communication systems such as Bluetooth Enhanced Rate (EDR), WLAN and mobile phones all use non-fixed envelope RF signals to improve spectrum utilization. Linear amplification of non-fixed-envelope RF signals requires linear power amplifiers whose efficiency degrades in back off output power regions. The problem of linearity and efficiency constraining each other has been extensively studied, and many methods have been proposed for more efficient linear scaling. A power amplifier (referred to as a power amplifier) can maintain efficiency in a fallback output power region by reducing the voltage or power amplifier current. [0003] figure 1 Schematically shows a traditional polar transmitter, which decomposes the modulated input signal Vin into...
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IPC IPC(8): H03G3/20
CPCH03G3/20
Inventor 李明原吴悦夏波
Owner WUXI ZGMICRO ELECTRONICS CO LTD