1. Review of current systems for broadband wireless access

Within the market, the main competition WiMAX comes from existing, widely deployed wireless systems such as UMTS and CDMA2000, as well as a number of Internet-oriented systems, such as HiperMAN and long range mobile Wi-Fi Mesh and networks.

The major cellular standards currently developed so-called 4G, high bandwidth and low latency, all-IP networks with voice services built on top. All over the world to upgrade to 4G for GSM/UMTS and AMPS/TIA (including CDMA2000) is the 3GPP Long Term Evolution efforts. It is planned to replace CDMA2000-called Ultra Mobile Broadband has been discontinued. For 4G systems, available interfaces of air released in favor of OFDMA on the downlink and various techniques for OFDM Uplink similar to WiMAX.

In some parts of the world, the wide availability of UMTS and a General desire for standardization mean spectrum has not been allocated for WiMAX: in July 2005, the EU-wide distribution of frequencies for WiMAX was blocked.

One of the significant advantages of advanced wireless systems such as WiMAX is spectral efficiency. For example, 802.16-2004 (fixed) has a spectral efficiency of 3.7 (bit / s) / Hertz, and other 3.5-4G wireless systems offer spectral efficiency, which is similar to the tenth of a cent. A notable advantage of WiMAX comes from combining SOFDMA with smart antenna technology. This increases the effective spectral efficiency through reuse and smart deployment topologies of the network. Direct use of the frequency domain organization facilitates projects using MIMO-AAS compared to CDMA / WCDMA methods, resulting in more efficient systems.

Table 1. A comparison of the main suppliers of the Internet resource.

Standard	Family	Basic use	Radio Technology	Down (Mbps)		Uplink (Mbps)	Notes
LTE	UMTS/4GSM	General 4G	OFDMA / MIMO / SC-FDMA	360		80	LTE-Advanced update to offer several Gbps speed.
WiMAX	802,16	Mobile Internet	MIMO-SOFDMA	144		35	WiMAX m pack we offer up to 1 Gbit / s fixed speeds.
Flash-OFDM	Flash-OFDM	Mobile Internet mobility up to 200mph (350km / h)	Flash-OFDM	5,3 10,6 15,9		1,8 3,6 5,4	The mobile range of 18miles (30 km) extended range 34 miles (55 km)
HiperMAN	HiperMAN	Mobile Internet	OFDM	56,9		56,9
Wi-Fi	802,11 (11N)	Mobile Internet (indoors)	OFDM / MIMO	288,9 (Supports 600MBps @ width 40MHz channel)				Antenna, RF front accessories end and a small timer settings (310 km & 382km).
iBurst	802,20	Mobile Internet	HC-SDMA / TDD / MIMO	95	36		Cell Radius: 3-12 кмSpeed: 250kmph Spectral efficiency: 13 bits / s / Hz / Cell
EDGE Evolution	GSM	Mobile Internet	TDMA / FDD	1,9	0,9		3GPP Release 7
UMTS W-CDMA HSDPA + HSUPA HSPA +	UMTS/3GSM	General 3G	CDMA / FDD CDMA / FDD / MIMO	0,384 14,4 42	0,384 5,76 11,5		HSDPA is widely deployed. Typical descending speed today 2 Mbit / s, ~ 200 kbit / s line connection "descending HSPA + up to 42 Mbps.
UMTS-TDD	UMTS/3GSM	Mobile Internet	CDMA / TDD	16	16		Marked speed according to IPWireless using 16QAM modulation similar to HSDPA + HSUPA
1xRTT	CDMA2000	Mobile phone	CDMA	0,144	0,144		Successor EV-DO
EV-DO 1x Rev. 0 EV-DO 1x Rev.A EV-DO CDMA2000Rev.B	CDMA2000	Mobile phone	CDMA / FDD	2,45 3,1 4.9xN	0,15 1,8 1.8xN		Rev B note: N is the number of pieces of 1.25 MHz spectrum is used. Not yet deployed