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| GOLD Signal Processor (GOLD-SP) PMB 2707 General Description The GOLD Signal Processor (GOLD-SP) is part of a chip set, which covers all functions of a mobile radio provided for the Global System for Mobile communications, GSM. A mobile terminal which contains this chip set will meet all performance requirements set down in the GSM recommendations speech and data services. GOLD-SP contains a fullrate speech codec, a channel codec with soft-decision decoding and a complex Viterbi equalizer, all as DSP firmware. Moreover all digital filtering needed for baseband and voiceband processing, and also GMSK modulation is performed on this chip. Type PMB 2707-F Features Package P-TQFP-100-1 (SMD) * Two parallel DSP cores type SPC each with high performance (26 MIPS @ 2.7 V), low current consumption (< 1 mA/MlPS), all memory needed for fullrate operation on chip, shared access to complete controller memory * GSM functions realized as DSP firmware - Complex soft-output equalizer - Frequency correction burst handling - Full duplex handsfree - Channel coding - Soft-decision decoding (bit-by-bit) - Speech coding and decoding (RPE-LTP) * Digital baseband filter Automatic amplitude calculation Automatic amplitude offset measurement * Ciphering with A51/A52 * Digital voiceband filters (receive, transmit) * GMSK modulator * PLL-based system clock generation * Package: P-TQFP-100, 14 x 14 mm, 0.50 mm pitch * 3-V supply voltage ( 10 %) Ciphering Voice Band Voice Band DAC Voice Band Voice Band ADC Speech Encoder Channel Encoder Burst B GMSK BaseBand DAC Speech Decoder Channel Decoder "Soft" Equalizer "Soft" Base Band BaseBand ADC ITB06064 Block Diagram Siemens Aktiengesellschaft 1 |
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