Freescale RFX300-30 3G RF子系统

       Freescale的RFX300-30是业界最小的3G RF子系统,是第五代UMTS/EDGE无线电收发系统.

       RFX300-30是单片封装的多模式多频段UMTS/EDFE解决方案,主要的元件包括MMM7210 单片WCDMA/EDGE/GSM收发器和MMM6038 功率放大器.本文介绍了它们的主要性能以及子系统的方框图.

      Fifth-Generation UMTS/EDGE Radio System
Freescale’s RFX300-30 is the world’s smallest 3G RF subsystem. It is a multimode, multiband UMTS/EDGE solution in a single integrated package with the benefit of smart RF. The RFX300-30 is also the first to offer an open standard digital interface for greater compatibility with industry basebands. This highly integrated, comprehensive radio solution for 3G terminals provides an extremely compact board area and low electronic bill of materials. 

      革命性可编程的方法:

      The RFX300-30 improves upon Freescale’s long history of GSM/EDGE/WCDMA RF subsystems with embedded intelligence and simplified layer-one programming. As multiband and multimode phone electronics become more complex and form factors become smaller, simplified programming is key to getting a phone right the first time. Traditional RF baseband programming must consider all the critical timing between the
transceiver, power amplifiers, switches, lownoise amplifiers, baseband processor and voltage regulators. The digital baseband must perform many calibrations to control a transceiver and the detailed timing of all transceiver functions. This interaction results in a significant time investment to complete phone development successfully. With Freescale’s revolutionary approach, an engineer enters a single command stating
the desired channel and power level. This command sets the parameters and times the events so that system compliance is virtually assured.

      RFX300-30 元件:

      The RFX300-30 reduces the subsystem chip count, reducing board space and system cost. Freescale’s subsystem includes the MMM7210 UMTS/EDGE transceiver and the MMM6038 EDGE power amplifier. This solution is based on Freescale’s revolutionary Polar architecture that delivers an optimal balance of low current, small size, and most important, a highly manufacturable radio. Using fewer and smaller devices can provide
savings in development and material costs, so incorporating the RFX300-30 RF subsystem into a design can help meet today’s aggressive targets.

      MMM7210 单片WCDMA/EDGE/GSM收发器:

       The MMM7210 transceiver is a highly integrated transceiver that combines quad-band GSM/EDGE functionality with up to four WCDMA bands in a single package solution. The receiver has five inputs supporting both WCDMA and GSM/EDGE and uses a new RF front-end topology for superior intercept points. The receiver also includes anti-aliasing filters, digital channel filters, digital gain control and high dynamic range ADCs.
MMM6038 功率放大器:

       The MMM6038 power amplifier module supports quad-band GSM/EDGE applications through a dual-PA lineup. The low-band lineup supports GSM850 and GSM900. The high-band lineup supports GSM1800 and GSM1900. The module also incorporates 50 ohm matching circuits for the input and output.

       Quad-band GSM/EDGE applications are supported through a dual-PA lineup
Integrated harmonic filters, couplers and power detector
7.5 mm x 7.5 mm package

       主要优势:

        Significantly shorter test and development times with improved final yields
Single-chip UMTS/EDGE transceiver
Highest level of integration provides extremely compact board area and low electronic bill of material
Full antenna-to-bits functionality, no separate analog baseband required
Freescale’s revolutionary Polar architecture provides complete closed-loop control for manufacturability ease and extremely low current consumption
First 3G subsystem to offer an open standard digital interface to the baseband processor for ease of design
Embedded control provides less dependency on Layer 1 software and simplifies software programming

      RF子系统方框图.

      UMTS/EDGE 无线电收发解决方案特性:
Quad-band WCDMA: bands I-VI, VIII, IX (FOMA 1700), X and FOMA 800 support
Quad-band EGPRS: GSM850, EGSM900, DCS1800 and PCS1900
WCDMA Power Class 3 operation
EDGE Power Class E2 operation
GMSK Power Class 4 operation in GSM850 and EGSM900 bands
GMSK Power Class 1 operation in DCS1800 and PCS1900 bands
EDGE Class 34 operation
Low current consumption
Direct-conversion, filter-free revolutionary Polar architecture transmitter
HSDPA/HSUPA capable
Closed-loop power control
Streamlined programming model for rapid software implementation
Digital interface to baseband processor
Auto-calibrated transmitter
A single MMM7210 enables 13 cellular bands, including World phones, such as Bands I, II, IV, V (VI)/Quad EGPRS

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