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A 1.2V 26mW Configurable Multiuser Mobile MIMO-OFDM/-OFDMA Baseband Processor

A 1.2V 26mW Configurable Multiuser Mobile MIMO-OFDM/-OFDMA Baseband Processor. Motivations Most are single user, SISO, downlink OFDM solutions Training or subcarrier allocation dependent multiuser frequency synchronization Conventional ICI/MAI cancellation is computational intensive Targets

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A 1.2V 26mW Configurable Multiuser Mobile MIMO-OFDM/-OFDMA Baseband Processor

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  1. A 1.2V 26mW Configurable Multiuser Mobile MIMO-OFDM/-OFDMA Baseband Processor • Motivations • Most are single user, SISO, downlinkOFDM solutions • Training or subcarrier allocationdependent multiuser frequency synchronization • Conventional ICI/MAI cancellation is computational intensive • Targets • Communication SoC • Multiuser solution • High performance/low complexity ICI/MAI cancellation • Power efficient processor • Mobility Base-Station

  2. Architecture of the Proposed Receiver Parallel processing for output latency improvement Buffer scheduling for memory reduction Taylor series expansion for MUL reduction New algorithm for joint ICI/MAI cancel. and CFO est. design

  3. Implementation Results Chip Summary Chip Micrograph • 2 orders BER and MSE improvement • 78% hardware reduction in ICI/MAI cancellation • Power efficient (2.31 Mbps/mW) ASIC implementation SoC Integration

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