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DSP Products – Digital DAS System

A distributed antenna system (DAS) is a way to deal with isolated spots of poor coverage inside a large building by installing a network of relatively small antennas throughout the building to serve as repeaters.

Digital DAS System

KT DAS Model : ALL in One

WCDMA/CDMA/LTE/WiMAX Support (8T/8R)
Multi-Vendor Support
6.4G Optic Framer Data Compress/Decompress
Multi-rate Sampling Process
CFR / Channel Filter
Power Detect / Spectrum Analyzer
UTP L2 Switch, PoE Support
Time Advance Delay : ~100us(100ns resolution)

SKT DAS Model : MiBOS

WCDMA/CDMA/LTE /WiMAX Support (11T/14R)
8Gbps Optic Framer
Data Compress/Decompress
Multi-rate Sampling Process
CFR / Channel Filter
10 MHz OCXO Hold-over Algorithm
Power Detect / Spectrum Analyzer
UTP L2 Switch
Time Advance Delay : ~100us(100ns resolution)

KT DAS Model : ELMO MDTU

WCDMA/LTE/WiMax (10T/10R)
3Gbps Optic Framer 8-Branch
Crest Factor Reduction (CFR) Solution
Channel Filter
Multi-rate Sampling Process
Power Detect
Time Advance Delay : ~100us(100ns resolution)

KT DAS Model : ELMO RDTU

WCDMA/LTE/WiMAX (6T/6R, 4T/4R)
3Gbps Optic Framer
Digital Pre-distortion (DPD) Solution
Channel Filter
Multi-rate Sampling Process
Power Detect
Time Advance Delay : ~100us(100ns resolution)

KT DAS Model : WaLTS DPD

WCDMA/CDMA/LTE (5T/6R)
3Gbps Optic Framer
Digital Pre-distortion (DPD) Solution
Channel Filter
Multi-rate Sampling Process
Power Detect / Flatness Equalizer
Time Advance Delay : ~100us(100ns resolution)

KT DAS Model : ELMO DPD

WCDMA/CDMA/LTE (5T/6R)
3Gbps Optic Framer
Digital Pre-distortion (DPD) Solution
Crest Factor Reduction (CFR) Solution
Channel Filter
Multi-rate Sampling Process
Power Detect / Flatness Equalizer
Time Advance Delay : ~100us(100ns resolution)

SKT DAS Model : IRO

WCDMA 2.1G /CDMA 800M /LTE 1.8G /LTE 2.1G/LTE2.6G MIMO Support(10T/10R)
10Gbps Optic Framer
Digital Pre-distortion (DPD) Solution
Crest Factor Reduction (CFR) Solution
Channel Filter
Multi-rate Sampling Process
Power Detect / Flatness Equalizer
Time Advance Delay : ~100us(100ns resolution)

GPS Timing Module

Specification and Property

Frequency Stability : 1.0E-11 (one day average)
Phase Noise : 125dBc@10Hz
PP1S/PP2S Phase Accuracy : +/- 30ns
GPS Receiver Sensitivity : -160dBm
GPS Frequency : L1 frequency, C/A Code
Holdover Phase offset : 7us/1day
Error Estimation using Kalman Filter

Adaptive Amplitude Equalizer

Specification and Property

TMS320C6711-250MHz Floating Point DSP
AM/FM/TRS Adaptive Equalizer
Remez FIR Coefficient Generation Algorithm
Automatic Gain Equalization +/- 1 dB Res.
AM 120 Channel, FM 100 Channel, TRS 640 Channel Generation
Top Module Level Interface : ASN. 1
Multi-channel Digital Filter Design

Node B Monitoring System(WCDMA)

Specification and Property

TMS320C6711-250MHz Floating Point DSP with RTOS
WCDMA Signal Measurement
Slot and Frame Synchronization (Cell Search)
P-CPICH Code Domain Power Measurement
Excellent Fine Accuracy (Code Domain Power) : +/- 0.1 dB Res.
High Resolution Spectrum Analyzer using FFT Algorithm
512 Codes Code Domain Power Measurement

WCDMA Receiver of PCCPCH

Specification and Property

TMS320C6700 Floating Point DSP with RTOS
Fast Cell Search for slot and frame synchronization
WCDMA Signal Measurement
P-CPICH Code Domain Power Measurement, P-CCPCH
Demodulation, Channel Decoding
ASN Decoding for SIB Message Parsing
PLMN Message Decoding
Viterbi Decoding

WCDMA Overhead Channel Modulator

Specification and Property

TMS320C6711-250MHz Floating Point DSP with RTOS
Fast Cell Search for slot and frame synchronization
PCCPCH Channel Demodulation
P-CPICH Code Domain Power Measurement, P-CCPCH
Demodulation and Channel Decoding
ASN Decoding for SIB Message Parsing
CPICH, PSCH,SSCH,PCCPCH Channel Generation and Modulation

SID Detection of EVDO, cdma2000, WCDMA

Specification and Property

TMS320C6711-250MHz Floating Point DSP with RTOS
PN Searching and PN Acquisition
IS95A,B cdma2000, 1xEvDO, WCDMA Support
Fine Frequency/Phase Offset Compensation
Rake Receiver for Multipath Combine
Sync channel Demodulation
SID Message Parsing
Turbo/Viterbi Decoding

Design of RFID MODEM ASIC

Specification and Property

ISO/IEC 18000-6C(EPC C1 Gen 2)
Cowork with ETRI,SKT
Built-in ADC/DAC
900MHz UHF Band
Miller Coding
Evaluation Version : FPGA
ASIC