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Their original scheme was based on trellis codes but the simpler block codes were utilised by Siavash Alamouti, [6] and later Vahid Tarokh, Hamid Jafarkhani and Robert Calderbank [7] to develop space–time block-codes (STBCs). STC involves the transmission of multiple redundant copies of data to compensate for fading and thermal noise in the ...
A space–time code (STC) is a method employed to improve the reliability of data transmission in wireless communication systems using multiple transmit antennas. STCs rely on transmitting multiple, redundant copies of a data stream to the receiver in the hope that at least some of them may survive the physical path between transmission and ...
User logged in, authorized by security data exchange. 234: Server accepts the security mechanism specified by the client; no security data needs to be exchanged. 235: Server accepts the security data given by the client; no further security data needs to be exchanged. 250: Requested file action was okay, completed. 300 Series
This is a list of Simple Mail Transfer Protocol (SMTP) response status codes. Status codes are issued by a server in response to a client's request made to the server. Unless otherwise stated, all status codes described here is part of the current SMTP standard, RFC 5321. The message phrases shown are typical, but any human-readable alternative ...
Space–time trellis codes (STTCs) are a type of space–time code used in multiple-antenna wireless communications. This scheme transmits multiple, redundant copies of a generalised TCM signal distributed over time and a number of antennas ('space'). These multiple, 'diverse' copies of the data are used by the receiver to attempt to ...
SMTP Authentication is an "extension" in SMTP terms, so it requires server and client to use EHLO verb for greeting to indicate support for extensions, as opposed to the obsolete HELO greeting. [10] For backward compatibility, HELO greeting may be accepted when no extension is used .
When set the AVP Code belongs to the specific vendor code address space. The " M " bit, known as the Mandatory bit, indicates whether support of the AVP is required. If an AVP with the " M " bit set is received by a Diameter client, server, proxy, or translation agent and either the AVP or its value is unrecognized, the message must be rejected.
STTD utilizes space–time block code (STBC) in order to exploit redundancy in multiple transmitted versions of a signal. STTD is one of numerous open loop transmit diversity schemes which also include Phase Switched Transmit Diversity (PSTD), Time Switched Diversity (TSTD), Orthogonal Transmit Diversity (OTD) and Space Time Spreading (STS) [1].