পদ্ধতির তুলনা করুন
নির্বাচিত পদ্ধতিগুলো পাশাপাশি পর্যালোচনা করুন; যে সারিগুলোয় পার্থক্য আছে সেগুলো চিহ্নিত করা হয়।
| অর্থোগোনাল ফ্রিকোয়েন্সি ডিভিশন মাল্টিপ্লেক্সিং (OFDM)× | মাল্টিপল-ইনপুট মাল্টিপল-আউটপুট (MIMO)× | |
|---|---|---|
| ক্ষেত্র | টেলিযোগাযোগ | টেলিযোগাযোগ |
| পরিবার | Process / pipeline | Process / pipeline |
| উদ্ভবের বছর≠ | 1971 | 1995 |
| প্রবর্তক≠ | Weinstein and Ebert | Telatar, Foschini, and Gans |
| ধরন≠ | multicarrier modulation scheme | spatial multiplexing technique |
| মৌলিক উৎস≠ | Weinstein, S. B., & Ebert, P. M. (1971). Data transmission by frequency-division multiplexing using the discrete Fourier transform. IEEE Transactions on Communication Technology, 19(5), 628-634. DOI ↗ | Telatar, I. (1999). Capacity of multi-antenna Gaussian channels. European Transactions on Telecommunications, 10(6), 585-595. DOI ↗ |
| অপর নাম≠ | multicarrier modulation | spatial multiplexing, antenna diversity |
| সম্পর্কিত | 5 | 5 |
| সারসংক্ষেপ≠ | OFDM is a multicarrier modulation technique that divides a wideband channel into many narrowband orthogonal subcarriers. Introduced by Weinstein and Ebert in 1971, it exploits the duality between time and frequency domains to efficiently use spectrum while mitigating intersymbol interference in frequency-selective channels. OFDM is now the standard for high-speed wireless systems including WiFi, cellular LTE, and digital broadcasting. | MIMO is a technique that uses multiple transmit and receive antennas to significantly increase channel capacity and reliability. Pioneered theoretically by Telatar (1999) and Foschini & Gans (1998), MIMO exploits multipath propagation—typically a liability in wireless—as an asset by creating independent spatial channels. It is now fundamental to all modern wireless systems including LTE, WiFi-6, and 5G, where it provides both capacity gains through spatial multiplexing and robustness through diversity. |
| ScholarGateডেটাসেট ↗ |
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