Orthogonal frequency-division multiplexing (redirect from COFDM)
single-carrier system. In coded orthogonal frequency-division multiplexing (COFDM), forward error correction (convolutional coding) and time/frequency interleaving...
88 KB (11,274 words) - 20:01, 31 January 2025
8VSB (section 8VSB vs COFDM)
is used primarily in North America; in contrast, the DVB-T standard uses COFDM. A modulation method specifies how the radio signal fluctuates to convey...
14 KB (1,698 words) - 21:39, 25 April 2024
Single-frequency network (section OFDM and COFDM)
broadcasting, self-interference cancellation is facilitated by the OFDM or COFDM modulation method. OFDM uses a large number of slow low-bandwidth modulators...
10 KB (1,348 words) - 18:53, 11 June 2024
designator for COFDM is W7D. The W7D comes from Paragraph 40 of the November 13, 2002, ET Docket 01-75 R&O. It is only coincidence that the QAM and COFDM emission...
12 KB (1,024 words) - 18:40, 22 August 2024
neighbours: it is not confined to a 4.3125 kHz wide channel. The orthogonality of COFDM makes this possible without interference. Up to 15 bits per symbol can be...
16 KB (3,004 words) - 02:32, 17 December 2024
transport stream, using coded orthogonal frequency-division multiplexing (COFDM or OFDM) modulation. It is also the format widely used worldwide (including...
36 KB (3,893 words) - 01:41, 4 January 2025
spectral masks for the same purpose. Many digital modulation methods such as COFDM use the electromagnetic spectrum very efficiently, allowing for a very tight...
3 KB (338 words) - 13:25, 7 February 2024
and TiMi 3. DVB-T uses coded orthogonal frequency division multiplexing (COFDM), which uses as many as 8000 independent carriers, each transmitting data...
47 KB (5,139 words) - 11:52, 9 January 2025
television may corrupt the signal beyond use for digital television. 8VSB, COFDM, and other modulation schemes seek to correct this. Ghost-canceling reference...
5 KB (438 words) - 12:16, 22 December 2024
included QAM, Spectrally-Shaped QAM, 6 VSB (with trellis code) and 4/2 VSB. COFDM had been proposed by third parties, but was rejected as not being mature...
7 KB (776 words) - 22:08, 12 January 2025
modulation used for DRM is coded orthogonal frequency division multiplexing (COFDM), where every carrier is modulated with quadrature amplitude modulation...
25 KB (3,014 words) - 10:07, 18 January 2025
listed use ATSC, which has a single VSB carrier wave. Other countries use COFDM modulation for DVB-T (Taiwan, Colombia, Panama) or ISDB-Tb (Philippines...
50 KB (2,004 words) - 10:15, 17 January 2025
with COFDM. Television newsgathering links from mobile vans to central receive points (often on mountaintops or tall buildings) use DVB-T with COFDM in...
35 KB (4,034 words) - 10:42, 16 January 2025
Integrated Coding And Multiplexing), Transmission Coding & Multiplexing and COFDM Modulation. MUSICAM was one of the few codecs able to achieve high audio...
28 KB (3,437 words) - 11:26, 24 December 2024
original on 2016-03-22. Retrieved 2014-12-11. "Transitioning transmitters to COFDM". Archived from the original on 2009-08-21. Retrieved 2009-06-17. R. Wolf;...
14 KB (1,256 words) - 11:18, 21 November 2024
Radio modulation AM FM COFDM Frequency allocations LW (LF) MW (MF) SW (HF) VHF (low / mid / high) L band (UHF) Digital systems CAM-D DAB/DAB+ DRM/DRM+...
34 KB (3,880 words) - 14:35, 31 January 2025
technology was known as DirectBand. FMeXtra on FM uses dozens of small COFDM subcarriers to transmit digital radio in a fully in-band on-channel manner...
10 KB (1,351 words) - 22:39, 22 January 2025
purchase a new DRM receiver. The modulation used is a form of OFDM called COFDM in which, up to 4 carriers are transmitted on a channel formerly occupied...
163 KB (16,266 words) - 16:05, 25 January 2025
is still a robust signal under various conditions. 8VSB was chosen over COFDM in part because many areas are rural and have a much lower population density...
47 KB (4,940 words) - 07:25, 11 January 2025
"Performance of MC-CDMA systems in multipath indoor environments. Comparison with COFDM-TDMA system". First International Conference on 3G Mobile Communication...
21 KB (2,717 words) - 17:04, 6 January 2025
Philips since 1989. This codec incorporated into a broadcasting system using COFDM modulation was demonstrated on air and in the field with Radio Canada and...
107 KB (11,548 words) - 17:47, 28 January 2025
spectrum. The idea of LTE was first proposed in 1998, with the use of the COFDM radio access technique to replace the CDMA and studying its Terrestrial...
77 KB (7,659 words) - 10:32, 11 January 2025
registration is required to download PDF) Stott, J. H.; The How and Why of COFDM, BBC Research Development WorldDAB, the global industry forum for digital...
94 KB (9,974 words) - 03:12, 23 January 2025
Radio modulation AM FM COFDM Frequency allocations LW (LF) MW (MF) SW (HF) VHF (low / mid / high) L band (UHF) Digital systems CAM-D DAB/DAB+ DRM/DRM+...
3 KB (349 words) - 00:08, 3 January 2025
United States).[citation needed] The modulation method used in DVB-T is COFDM, with either 64 or 16-state Quadrature Amplitude Modulation (QAM). In general...
209 KB (18,993 words) - 19:50, 29 January 2025
modulation methods: for instance, the DREAM open-source project decodes the COFDM technique used by Digital Radio Mondiale. There is a broad range of hardware...
30 KB (3,940 words) - 23:08, 15 November 2024
digital sound broadcasting uses CDM, and ISDB-T (in VHF and/or UHF band) uses COFDM with PSK/QAM. Besides audio and video transmission, ISDB also defines data...
56 KB (5,228 words) - 11:08, 7 December 2024
the FCC's choice of ATSC and 8VSB over worldwide-standard DVB-T and its COFDM modulation. Additionally, without the hierarchical modulation of DVB, signal...
115 KB (12,097 words) - 22:51, 26 January 2025
30 MHz. The two standards also share the same basic modulation scheme (COFDM), and HD AM uses a proprietary codec. DRM 30 operates with xHE-AAC, historically...
79 KB (9,253 words) - 10:05, 18 January 2025