Cellular 3G Technology Vs 4G Technology

4G technology is with us already in some cities. What can 4G bring us?

The following table shows comparisons between some key parameters of 3GVs possible 4Gsystems.

 

Item	3G	4G
Frequency Band	1.8 – 2.5 GHz	2 – 8 GHz
Bandwidth	5-20 MHz	5-20 MHz
Data rate	Up to 2Mbps ( 384 kbps WAN)	Up to 20 Mbps or more
Access	Wideband CDMA	Multi-carrier-CDMA or OFDM(TDMA)
FEC	Turbo-codes	Concatenated codes
Switching	Circuit/Packet	Packet
Mobile top speeds	200 kmph	200 kmph

 In the next topics, we mainly discuss the 4g terminal and 3g terminal comparasion, especially the 4g lte router and 4g lte modem.

Cellular 3g router with wireless modules MC8790

Nowadays 3g router mostly has two types. Firstly is built-in 3g module. The other one is with usb host and work with an external modem.

Sierra MC8790 series is one of 3g modem module popular for 3g routers.

Short Info:

Sierra Wireless AirPrime MC8790 and MC8790V embedded wireless modules provide wide area wireless data access at speeds up to 7.2 Mbps downlink and up to 5.76 Mbps uplink. These modules offer UMTS/HSPA and quad-band GSM/GPRS/EDGE network access for roaming on high-speed networks worldwide. In addition, antenna diversity improves fringe performance on global HSPA networks using the 850, 1900 and 2100 MHz bands.

Key Features:

• Peak downlink speeds up to 7.2 Mbps and peak uplink speeds up to 5.76 Mbps
• Uses MSM6290™ chipset from QUALCOMM
• World class product performance, quality and reliability
• Solid documentation, tool development and consultation services
• Solid support for device integration and verification
• Comprehensive SDK and enabling software
• Flexible driver strategy with NDIS support and non-NDIS abilities

Key Benefits:

• High-speed, broadband connectivity
• Best-in-class technical and integration support
• Easy integration
• Premium functionality and performance
• Compact size and light weight
• Antenna diversity for improved fringe performance
• Triband for global connectivity

Specifications

Air Interface	HSUPA HSDPA EDGE GPRS GSM
Frequency Bands	WCDMA 850/1900/2100 MHz EDGE/GPRS/GSM 850/900/1800/1900 MHz
Approvals	FCC, IC, CE, GCF, PTCRB, A-Tick, AT&T, Telstra, NTT DoCoMo, Softbank, Bell
Standby and Idle Power	4-5mA
GSM GPRS Max Power	2.6A
HSxPA Max Power	720mA
CPU IO Voltage Performance	2.6V
Codec	HR, FR, EFR, AMR
Echo Cancellation and Noise Reduction	Yes
DTMF	Yes
UART	1x 8-wire
USB	USB 2.0 high speec
ADC	1
Flash LED Output	1
PWM Buzzer	No
Keyboard Interface	No
SIM Interface	1.8V or 3V
Antenna Diversity	Yes
Location Solution	gpsOne
Embedded SIM	No
Control Options	AT commands
Device Management	No
Drivers	Windows 7 Windows 7 Mobile Broadband Windows Vista Windows Vista x64 Windows XP Windows XP-x64 Linux Windows CE Windows Mobile
Device Dimensions	51x30x4.5mm