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WiMAX
Overview
With a MAC-to-PHY implementation of the IEEE 802.16-2004 broadband wireless access (BWA) standard, the Fujitsu WiMAX SoC, MB87M3400, offers a cost-effective solution for both subscriber station and base station applications. This highly integrated SoC implements MAC, PHY, radio control and all the necessary analog circuits for the appropriate 2 to 11GHz licensed or license-exempt bands
The Fujitsu WiMAX SoC, MB87M3400, fully complies with the IEEE 802.16-2004 standard using an OFDM PHY. The SoC can operate in TDD or FDD modes and supports all the available channel bandwidths from 1.75MHz up to 20MHz bandwidths. A programmable frequency selection generates the sample clock for any desired bandwidth. When applying 64QAM modulation in a 20MHz channel and using all 192 sub-carriers, the chip can sustain up to 100Mbps peak raw data speed. Uplink subchannelization is supported as defined in the standard.
The SoC's integrated ARM926 RISC engine implements 802.16 upper layer MAC, scheduler, drivers, protocol stacks, and user application software. A multi-channel DMA controller handles high-speed transactions among various agents on a high-performance bus. To offload processing from the upper layer MAC and enhance performance, the Fujitsu WiMAX SoC includes a separate ARC RISC/DSP engine to execute 802.16 lower layer MAC functions. The chip's multiple hardware-based encryption/decryption engines are tightly coupled with this lower layer MAC processor and can be enabled to provide full security for the MAC privacy sub-layer.
Key Features
- Full compliance with the IEEE 802.16-2004 standard
- Support for both subscriber stations and base stations for TDD or FDD applications
- High-performance modulation capabilities for complete versatility:
- 256 OFDM PHY with 64QAM, 16QAM, QPSK, and BPSK modulation
- Uplink subchannelization for 16 subchannels
- Flexible configuration for easy system integration:
- High-performance ADC and DAC for flexible baseband interfacing
- Automatic frequency control (AFC) with integrated DAC
- Dynamic frequency selection (DFS) with integrated ADC
- Integrated ADC for transmit and receive power measurements
- Rich set of integrated peripherals and RF control
- Programmable automatic gain control (AGC) for supporting a broad range of RF attenuators
- Security implementation based on DES, AES/CCM encryption/decryption
- Dual RISC processors for implementing upper and lower layer MAC
- Integrated memory controller and DMA controller
- Integrated Ethernet engine for network interface
- 436 BGA package
- Complete reference design with software and radio solution
