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There are 13 names in this directory beginning with the letter O.
OBEX: OBject Exchange

OBject EXchange (OBEX or IrOBEX) is a communications protocol that facilitates the exchange of binary objects between devices. It is maintained by the Infrared Data Association but has also been adopted by the Bluetooth Special Interest Group and the SyncML wing of the OMA. One of OBEX's earliest popular applications was in the Palm III personal digital assistant. This PDA and its many successors use OBEX to exchange business cards, data, even applications.

OCQPSK: Orthogonal Complex Quadrature Ph

Orthogonal Complex Quadrature Phase Shift Keying (OCQPSK), also known as HPSK, is a digital modulation scheme that conveys data by changing, or modulating, the phase of a reference signal (the carrier wave).

OFDM: Orthogonal Frequency Division Mult

Orthogonal Frequency Division Multiplexing (OFDM) is an FDM modulation technique for transmitting large amounts of digital data over a radio wave. OFDM works by splitting the radio signal into multiple smaller sub-signals that are then transmitted simultaneously at different frequencies to the receiver. 802.11a WLAN, 802.16 (WiMAX) technologies use OFDM as the physical layer communication standard.

OFDMA: Orthogonal Frequency Division Mul

Orthogonal Frequency Division Multiple Access (OFDMA), also referred to as Multiuser-OFDM, is being considered as a modulation and multiple access method for 4th generation wireless networks. OFDMA is an extension of Orthogonal Frequency Division Multiplexing (OFDM), which is currently the modulation of choice for high speed data access systems such as IEEE 802.11a/g wireless LAN (WiFi) and IEEE 802.16a/d/e wireless broadband access systems (WiMAX).

OHG: Operators Harmonization Group

Operators Harmonization Group (OHG) is a group of industry operators established to meet on harmonization issues. The group is working towards a way of harmonisation between CDMA2000 and W-CDMA.

Okamura model

Okamura model is a propagation prediction model for land-mobile communications developed by Yoshi Okamuar et al. in the late 1960s.

OMA: Open Mobile Alliance

Open Mobile Alliance (OMA) is the leading industry forum for developing market-driven, interoperable mobile service enablers. OMA was formed in June, 2002, by nearly 200 companies including the world’s leading mobile operators, device and network suppliers, information technology companies and content and service providers. The fact that the whole value chain is represented in OMA marks a change in the way specifications for mobile services are done.

OMC: Operations & Maintenance Center

Operations & Maintenance Center (OMC) is a location used to operate and maintain a wireless network.

OQPSK: Offset Quadrature Phase Shift Key

Offset Quadrature Phase Shift Keying (OQPSK), sometimes called Staggered QPSK (SQPSK), is a type of QPSK modulation that offsets the bit streams on the I and Q channels by a half bit. This reduces amplitude fluctuations and helps improve spectral efficiency. In other words, using OQPSK increases the temporal efficiency of normal QPSK.

ORFS: Output Radio Frequency Spectrum

Output Radio Frequency Spectrum (ORFS) is a measurement for GSM signals that tests for interference in the adjacent frequency channels (ARFCNs) and results from two effects: modulation within the bursts and the power that ramps up and down, or switching transients. ORFS is a critical GSM transmitter measurement.

OSA: Open System Architecture

Open System Architecture (OSA) is part of the 3rd generation (3G) UMTS mobile telecommunications network. OSA describes how services are architected in a UMTS network. The OSA provides APIs to access the network functions like authentication and authorization of the user. The APIs are guaranteed to be secure, independent of vendor specific solutions and also independent of programming language by use of Object Oriented techniques like CORBA, SOAP etc. Various services like VPN, conferencing and many more unknown services can be implemented with the help of these APIs. The standards for OSA are being developed as part of the 3rd Generation Partnership Project (3GPP).

OVSF: Orthogonal Variable Spreading Func

Orthogonal Variable Spreading Function (OVSF) is a set of spreading codes derived from tree-structured set of orthogonal codes and are used to channelize the IMT-2000/ULTRA system.

oWIP: Voice over Wireless IP

Voice over Wireless IP (VoWIP) is the combination of VoIP with 802.11 wireless LANs to create a wireless telephone system. VoWIP enables businesses to leverage their wireless LANs to add voice communications, enabling companies to deploy and manage voice and data over a single wireless backbone. VoWIP applications require some reservation of bandwidth to support the real-time nature of voice. Proprietary standards like Spectralink Voice Priority (SVP) are today's solution; however, the IEEE is developing the 802.11e standard for quality of service as a long-term solution.

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