| Single- and multi- carrier IDMA schemes with cyclic prefixing and zero padding techniques Recent countries visiting this post |  |
 | 5 | United States |
 | 4 | China |
 | 1 |
| Single- and multi- carrier IDMA schemes with cyclic prefixing and zero padding techniques Recent countries visiting this post | |
| 5 | United States |
| 4 | China |
| 1 |