User's Manual

Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 19
2
2: Technology Overview
LTE
LTE (Long Term Evolution) is a 4th-generation wireless standard.
The
3GPP Release 8 specification outlines the features and
requirements.
Key features include.
• Peak data rate:
· 100 Mbps DL within 20 MHz bandwidth
(Peak DL data rate in 10 MHz bandwidth: 70 Mbps (approx.) for
Cat
3 device)
· 50 Mbps UL within 20 MHz bandwidth
Actual throughput is dependent on the network configuration,
bandwidth assigned to the UE, the number of users, and RF sig
-
nal conditions.
• Up to 200 active users in a cell (5 MHz)
• Less than 5 ms user-plane latency
• Supported bandwidths: 5 MHz / 10 MHz
• Spectrum flexibility: 1.4–20 MHz (3–20 MHz in future F/W
release)
• Enhanced support for end-to-end QOS
• Physical layer uses:
· DL: OFDMA (Orthogonal Frequency Division Multiple Access).
Modulation: QPSK, 16QAM, and 64QAM
· UL: Single Carrier FDMA (single carrier modulation and
orthogonal frequency multiplexing)
Modulation: QPSK, 16QAM
• MIMO (Multi-Input Multi-Output) antenna support
CDMA
1xEV-DO
1xEV-DO is backwards compatible to both 1X and IS-95A/B
standards. However, 1xEV-DO represents an evolutionary
enhancement, specifically designed and optimized for high-speed
wireless data access. This was driven by fundamental differences
between voice and data traffic characteristics.