Modulating Signal Description Modified

0075-EX-ML-2005 Text Documents

Spectrum Telecom, Inc.

2005-06-03ELS_71186

Spectrum Telecom, Inc. FRN 0013137468 FCC Form 442 File No. 0075-EX-ML-2005 Confirmation Number EL914321 Call Sign WD2XQD MODULATING SIGNAL DESCRIPTION - MODIFIED Applicant Spectrum Telecom, Inc. (“Spectrum Telecom”) proposes to the following parameters for its modulation. Navini Equipment: Multi-carrier Synchronous CDMA 5 MHz channels 10 – 500 kHz sub-carriers 10 ms TDD Timing 400 khz Carrier Chip Rate 32 chips TCC, 64 chips Sync QPSK, 8PSK, 16QAM Uplink, QPSK Downlink Dynamic based on SNR evaluated every 10 ms. Transmission efficiency is 66.5% (includes LLC) BER: 10 to the minus 3, before FEC Forward Link: Beam Forming Reverse Link: Spatial Filtering: Enhanced Nulling Aperto Equipment: Multi-carrier Synchronous ATDMA 7 MHz channels 10 – 500 kHz sub-carriers 10 ms TDD Timing 400 kHz Carrier Chip Rate 32 chips TCC, 64 chips Sync QPSK and 16QAM, Adaptive Dynamic based on SNR evaluated every 10 ms. Transmission efficiency is 66.5% (includes LLC) BER: 10 to the minus 3, before FEC Forward Link: Beam Forming Reverse Link: Spatial Filtering: Enhanced Nulling -1-

Redline Equipment: Multi-carrier Synchronous ATDMA 14 MHz channels 256 kHz sub-carriers 10 ms TDD Timing 400 kHz Carrier Chip Rate 32 chips TCC, 64 chips Sync QPSK, 16QAM and 64QAM, adaptive Dynamic based on SNR evaluated every 10 ms. Transmission efficiency is 66.5% (includes LLC) BER: 10 to the minus 3, before FEC Forward Link: Beam Forming Reverse Link: Spatial Filtering: Enhanced Nulling -2- 9226379v1


Document Created: 2005-06-03 17:29:24
Document Modified: 2005-06-03 17:29:24
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