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Fullchipdesign.com - Topics covered in Verilog RTL, Digital Design, Digital Basics, Radio Frequency and Python Scripting.
LTE Data rates, frequency and bandwidth.
In digital computing data rates are computed as number of bits that can be transmitted over the air in one unit of time. The comparison of data rates between 3G and 4G technologies is discussed below.
3G/4G data rate comparison.
LTE Data rates
The data rates shown in table above are in units of Mega bits per second. The rates are calculated using mathematical models.
In practical, the data rates are generally reduced to one fourth of mathematical figures. There are several bottlenecks in modem physical layer and data link layer protocols that can effect actual data rate. These high data rates are highly suited for HD or 1080p videos, gaming, voip, web surfing etc.
In practical, the data rates are generally reduced to one fourth of mathematical figures. There are several bottlenecks in modem physical layer and data link layer protocols that can effect actual data rate. These high data rates are highly suited for HD or 1080p videos, gaming, voip, web surfing etc.
3G
4G
Technology
UMTS, HSDPA, HSUPA
LTE
Uplink (Theoretical)
5.7 Mbps
50 Mbps
Downlink (Theoretical)
14 Mbps
100 Mbps
Bandwidth
5 MHz
20 MHz
Evolved Packet Core (EPC) system architecture for all IP.Mobility Management Entity (MME),
Serving System (S) Architecture (A) Evolution (E) Gateway or Serving Gateway SGW.
Packet Data Network (PDN) SAE Gateway
Enhanced Packet Data Gateway (ePDG)
Multiple antenna techniques - AAS and Antenna diversity - AD
Serving System (S) Architecture (A) Evolution (E) Gateway or Serving Gateway SGW.
Packet Data Network (PDN) SAE Gateway
Enhanced Packet Data Gateway (ePDG)
Multiple antenna techniques -
Resources
Verilog RTL code examples for front-end chip design.
Digital Design Topics
Half-adder , full-adder ,
Adder-sub tractor
Stack Organization - LIFO, RPN
Parity Generation and error checking
Binary multiplier circuit.
CMOS introduction
Digital fundamentals -
RTL coding guidelines. ICG cell, Assertions, $assertkill, levels. Chandle
Pipeline vs. Parallel processing.
Verilog RTL code examples for front-
Half-
Adder-
Stack Organization -
Binary multiplier circuit.
CMOS introduction
Digital fundamentals -
RTL coding guidelines. ICG cell, Assertions, $assertkill, levels. Chandle
Pipeline vs. Parallel processing.
LTE frequencies and bandwidth
USA is leading in LTE network launch. The two carriers who operate with LTE are within the 700 MHz frequency band. AT&T will operate mostly within the 704-746 MHz bands. Verizon’s will utilize the 746-787 MHz frequencies.
Within that spectrum LTE can operate with different frequency bandwidths. For each bandwidth there is a corresponding number of allocated resource blocks.
Within that spectrum LTE can operate with different frequency bandwidths. For each bandwidth there is a corresponding number of allocated resource blocks.
Channel Bandwidth [MHz]
1.4
3
5
10
15
20
Number of RB’s
6
15
25
50
75
100