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LTE eNodeB Physical Layer
The eNodeB Physical Layer is licensable in ANSI C-Code for LTE base stations OEMs, ODMs, and R&D organizations. The C-code is thoroughly verified and tested across all bandwidths, with respect to third party test tools and meet the LTE PHY specifications as per 36.211, 36.212, 36.213, 36.214 and 36.104 for Uplink and Downlink functionalities in TDD and FDD modes. Online tests and verification of the PHY was done through RF interface to LTE UE at 30.72 MHz IQ sampling rate.|Extensive feature list|.
Some Key Features:
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The ANSI C-code is the LTE UE PHY Golden Reference code.
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Can be ported across DSP, FPGA and ASIP platforms of customers’ end products.
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Benchmark new algorithms in offline and online mode.
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Generate Test Vectors at any part of the Physical layer.
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Emulating different channel models.
eNodeB System Features:
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Speed and efficiency: System Latencies
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Synchronization and Tracking
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System Timing Control
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Timing Advance Corrections
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Signal Quality Reports: CQI, PMI, RI
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System Impairments Estimation and Compensation
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UL and DL Transmit Power Control
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Open Loop, Closed Loop MIMO
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Cell boundary resource allocations mechanisms
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Cell hand-off
3GPP Physical Layer Specifications:
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Features |
DL Receiver |
UL Transmitter |
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Bandwidth (MHz) |
1.4, 3, 5, 10,15, 20 |
1.4, 3, 5, 10,15, 20 |
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Txn BW (NRB) |
6, 15, 25, 50, 75, 100 |
6, 15, 25, 50, 75, 100 |
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Duplex Mode |
FDD, TDD |
FDD, TDD |
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Maximum Speed |
100 Mbps |
50Mbps |
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Antenna |
2x2 MIMO for DL Rx |
SISO for UL Tx |
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PHY Channels (Modulation) |
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PDSCH (QPSK, 16QAM, 64QAM)
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PDCCH (QPSK)
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PCFICH (QPSK)
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PHICH
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PBCH
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PMCH (QPSK, 16QAM, 64QAM)
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Cell-Specific RS
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UE Specific RS
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MBSFN Specific RS*
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PUSCH (QPSK, 16QAM, 64QAM)
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PUCCH (BPSK, QPSK)
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PRACH
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DRS
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SRS
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PHY Signals (Modulation) |
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P-SCH (One of 3 Zadoff-Chu seq)
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S-SCH (Two 31-bit BPSK M-seq)
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RS (Complex PRBS length 31 Gold Sequence) derived from cell ID
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DRS (Zadoff-Chu)
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SRS (Zadoff-Chu)
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OFDM |
OFDMA |
SC-FDMA |
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FFT size |
128 256 512 1024 1536 2048 |
128 256 512 1024 1536 2048 |
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Txn Modes |
1,2,3,4,5,6,7 |
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CP |
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Cell search, HARQ & Control params |
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Cell Searcher, PSS and SSS Sync
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HARQ processes with Soft-combining
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TA correction
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TPC
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CQI, PMI, RI, RSRP, RSSI reporting |
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