#ofdma

What is OFDMA (orthogonal frequency-division multiple access)? Orthogonal frequency-division multiple access (OFDMA) is a technology of Wi-Fi 6 (802.11ax) that lets access points serve multiple clients at the same time. OFDMA follows a set of rules created for the transmission of data between multiple terminals or clients over a transmission medium. The terminal could be any device at the end of…

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In recent years, WiMAX backer has been making great efforts to let this technology get the cloth administration as soon as possible, and hope that so as to make it move market share in the service field of broadband and maximize in future 4G.

In the course of making great efforts to realize this goal, wimax technology (LTE) at least than Long-Term Evolution Wait for other 4G technology based on OFDMA to lead for four years. WiMAX camp knows even, trying the course that 4G is generally deploying the administration will face a lot of difficulties, will meet in introduce, authorize the intersection of products and delay situation that appear to market. On the basis of the technology of CDMA, such as EvDO and HSPA have already realized the similar use that WiMAX promises. However, those technology needs to realize the investment repayment promised for longer periods. So wireless network market does not plan, accept, will let WiMAX sit, enjoy, take place dominant technology first by another.

It is generally acknowledged 3.5G technology can't offer with based on that the technology of OFDMA is the same speed and response time, but meanwhile, the former can carry on the abundant improvement in speed and response time, thus meet present market demand.

In addition, besides a family, other large-scale a gleam of wireless to run commercial city to be unwilling to invest in the intersection of cloth and the intersection of administration and another technology, this is WiMAX in the situation in 2008. Particularly, WiMAX is a kind of commercially feasible technology, but it is only because the subverting characteristic is accepted, a kind of route to develop the telecommunication industry as entering or together with telecommunication industry. Telecommunication industry demand, cut off umbilical is namely any wired to connect, even in the intersection of family and the intersection of amusement and service, the intersection of family and the intersection of person who connect with office Internet and traditional wired application day by day, even the wired connection in the fixed speech communication.

Fig. 1 shows as the wireless technological street map of movement of iSuppli Company.

In recent years, WiMAX backer has been making great efforts to let this technology get the cloth administration as soon as possible, and hope that so as to make it move market share in the service field of broadband and maximize in future 4G.

In the course of making great efforts to realize this goal, wimax technology (LTE) at least than Long-Term Evolution Wait for other 4G technology based on OFDMA to lead for four years. WiMAX camp knows even, trying the course that 4G is generally deploying the administration will face a lot of difficulties, will meet in introduce, authorize the intersection of products and delay situation that appear to market. On the basis of the technology of CDMA, such as EvDO and HSPA have already realized the similar use that WiMAX promises. However, those technology needs to realize the investment repayment promised for longer periods. So wireless network market does not plan, accept, will let WiMAX sit, enjoy, take place dominant technology first by another.

It is generally acknowledged 3.5G technology can't offer with based on that the technology of OFDMA is the same speed and response time, but meanwhile, the former can carry on the abundant improvement in speed and response time, thus meet present market demand.

In addition, besides a family, other large-scale a gleam of wireless to run commercial city to be unwilling to invest in the intersection of cloth and the intersection of administration and another technology, this is WiMAX in the situation in 2008. Particularly, WiMAX is a kind of commercially feasible technology, but it is only because the subverting characteristic is accepted, a kind of route to develop the telecommunication industry as entering or together with telecommunication industry. Telecommunication industry demand, cut off umbilical is namely any wired to connect, even in the intersection of family and the intersection of amusement and service, the intersection of family and the intersection of person who connect with office Internet and traditional wired application day by day, even the wired connection in the fixed speech communication.

Fig. 1 shows as the wireless technological street map of movement of iSuppli Company.

In recent years, WiMAX backer has been making great efforts to let this technology get the cloth administration as soon as possible, and hope that so as to make it move market share in the service field of broadband and maximize in future 4G.

In the course of making great efforts to realize this goal, wimax technology (LTE) at least than Long-Term Evolution Wait for other 4G technology based on OFDMA to lead for four years. WiMAX camp knows even, trying the course that 4G is generally deploying the administration will face a lot of difficulties, will meet in introduce, authorize the intersection of products and delay situation that appear to market. On the basis of the technology of CDMA, such as EvDO and HSPA have already realized the similar use that WiMAX promises. However, those technology needs to realize the investment repayment promised for longer periods. So wireless network market does not plan, accept, will let WiMAX sit, enjoy, take place dominant technology first by another.

It is generally acknowledged 3.5G technology can't offer with based on that the technology of OFDMA is the same speed and response time, but meanwhile, the former can carry on the abundant improvement in speed and response time, thus meet present market demand.

In addition, besides a family, other large-scale a gleam of wireless to run commercial city to be unwilling to invest in the intersection of cloth and the intersection of administration and another technology, this is WiMAX in the situation in 2008. Particularly, WiMAX is a kind of commercially feasible technology, but it is only because the subverting characteristic is accepted, a kind of route to develop the telecommunication industry as entering or together with telecommunication industry. Telecommunication industry demand, cut off umbilical is namely any wired to connect, even in the intersection of family and the intersection of amusement and service, the intersection of family and the intersection of person who connect with office Internet and traditional wired application day by day, even the wired connection in the fixed speech communication.

Fig. 1 shows as the wireless technological street map of movement of iSuppli Company.

Wireless broadband technological WiMAX has already become 3G standard formally, has unified frequency spectrum and cleared away the obstacle for the whole world in WiMAX standard, become 3G new members in the name of OFDMA WMAN TDD. International Telecommunications Union (ITU) Wireless communication (Radio Assembly) that is held in Geneva At the plenary session, the country participating in the conference has passed this decision formally through voting.

In April of 2001, it was three major 3G standards in the world that ITU established European WCDMA, U.S.A. CDMA2000 and China TD-SCDMA formally. At present, besides China, 3G TDD frequency spectrum of the hopeless most countries is in relatively leaving unused state, WiMAX will stand with the Off-The-Shelf movement communication skill on the same starting line, occupy TDD frequency band with China 3G standard TD-SCDMA together. WiMAX is only commercial first too, and then 3G standard accepted by ITU.