An easy approach to understand tech specs
LTE (Long Term Evolution)
Detailed LTE introduction can be referred from this link.
In brief LTE is a fourth generation (4G) wireless standard for broadband mobile technology. This standard is developed to meet long term future requirements of higher data rates, lower latency, better cell coverage and seamless handover.
Comparison of LTE and CDMA in terms of 3GPP. How t o decide which one is better LTE or CDMA?
1. LTE or CDMA Technology -
LTE is 4G all IP core based technology.
WCDMA is the latest standard on the evolution path of CDMA. It was first launched as 2G technology.
2. Coding Technology -
LTE uses OFDM-A. Which stands for Orthogonal Frequency Division Multiple Access.
CDMA uses unique spreading codes to spread the baseband data before transmission.
3. CDMA and LTE Duplex schemes -
LTE supports both FDD (Frequency Division Duplex) and TDD (Time Division Duplex).
W-CDMA also supports both FDD (Frequency Division Duplex) and TDD (Time Division Duplex)
4. Radio Channel -
LTE supports flexible carrier bandwidths, from a below 5MHz up to 20 Mhz.
In CDMA radio channels are fixed 5 MHz wide.
5. Data rates -
LTE supports very high data rates, best in industry. Refer this section.
CDMA chip rate - WCDMA chip rate is around 4 Mbps and cdma2000 is around 3.7 mbps.
Introduction of LTE and CDMA followed by LTE vs. CDMA comparison.
CDMA (Code Division Multiple Access)
Its a digital radio system that transmits streams of bits (PN codes). There are several generations of CDMA evolution path. Latest among them is WCDMA.
Return to Verilog Tutorial